⏰ Productivity
Time Management & Productivity Cheatsheet
Eisenhower matrix, time blocking, Pomodoro, GTD, habit systems and digital focus.
📖 10 sections
⏱ 20 min read
✅ Quizzes included
🌙 Dark mode
01 Core Principles ▼
Pareto Principle
20% of actions produce 80% of results. Identify your vital 20%.
Parkinson's Law
Work expands to fill the time available. Set tighter deadlines.
Zeigarnik Effect
Incomplete tasks occupy mental space. Write them down to free your brain.
Hofstadter's Law
Everything takes longer than expected, even accounting for this law.
Single-tasking
Multitasking reduces productivity by 40%. Focus on one task.
Decision fatigue
Mental energy depletes. Make important decisions in the morning.
MIT
Most Important Tasks — identify 3 each morning. Do them first.
Deep Work
Cal Newport: focused, distraction-free work on cognitively demanding tasks.
💡
Time management is really ATTENTION management. You can't manage time — only what you focus on.
02 Eisenhower Matrix ▼
COMMEisenhower Matrix
          URGENT          NOT URGENT
        ┌──────────────┬──────────────────┐
IMPORT  │  DO NOW      │  SCHEDULE        │
ANT     │ (crises,     │ (planning, study,│
        │  deadlines)  │  relationships)  │
        ├──────────────┼──────────────────┤
NOT     │  DELEGATE    │  ELIMINATE       │
IMPOR   │ (interrupts, │ (social scroll,  │
TANT    │  some email) │  trivial tasks)  │
        └──────────────┴──────────────────┘

The KEY: Most people live in Q1 (urgent+important)
The SECRET: Q2 (important, not urgent) prevents Q1 from happening!
  Q2 = exercise, learning, planning, relationships
💡
Do a weekly Q2 review: what important non-urgent things did you skip this week? Schedule them first next week.
03 Time Blocking ▼
COMMTime blocking
TIME BLOCKING:
  Schedule tasks in your calendar as blocks
  Treat them like meetings you can't miss
  No 'I'll do it when I find time' — there is no 'found time'

DAILY STRUCTURE TEMPLATE:
  06:00-07:00  Morning routine (movement, journal, review)
  07:00-09:00  DEEP WORK BLOCK 1 (hardest task)
  09:00-09:15  Break
  09:15-11:00  DEEP WORK BLOCK 2
  11:00-12:00  Admin, email, messages
  12:00-13:00  Lunch + walk
  13:00-15:00  Meetings, collaboration
  15:00-16:30  DEEP WORK BLOCK 3
  16:30-17:00  Daily review, tomorrow's plan

RULES:
  ✅ No interruptions during deep work blocks
  ✅ Buffer time between blocks
  ✅ Weekly review every Sunday (plan the week)
  ✅ Protect 3 deep work hours minimum daily
💡
Leave 20% of schedule empty. Unexpected things WILL happen. Buffer time prevents cascade failures.
04 Pomodoro Technique ▼
COMMPomodoro technique
CLASSIC POMODORO:
  🍅 25 minutes focused work
  ☕ 5 minute break
  After 4 pomodoros: 20-30 minute long break

DURING POMODORO:
  • No phone, no notifications
  • One task only — write it down first
  • If interrupted → note it → continue
  • Finished early? Review and improve

MODIFIED VERSIONS:
  50/10 — longer focus, better for complex work
  90/20 — ultradian rhythm (natural cognitive cycle)
  15/3  — light admin tasks

TRACKING:
  Log how many pomodoros per task
  Estimate future tasks in pomodoros
  4 focused pomodoros > 8 hours distracted

APPS: Forest, Be Focused, Toggl, simple timer
💡
Write EXACTLY what you'll do before starting: 'Write section 3 of report' not 'work on report'.
05 GTD System ▼
COMMGTD — Getting Things Done
CAPTURE:
  Collect EVERYTHING in one trusted inbox
  Brain dump: tasks, ideas, worries, to-dos
  Physical inbox, digital app, notebook

CLARIFY (process inbox 1-2x/day):
  Is it actionable?
    No → Reference, Someday/Maybe, or Trash
    Yes → Next action (2-min rule: do it now if < 2 min)
         → Delegate → or Schedule/defer

ORGANISE:
  Projects: outcomes requiring 2+ actions
  Next Actions: physical, visible next step
  Waiting For: things delegated to others
  Calendar: date/time specific
  Someday/Maybe: ideas for later

REVIEW:
  Daily: check today's calendar + next actions
  Weekly: review all lists, capture incomplete
  Monthly: review projects and goals

ENGAGE: Do!
2-Minute Rule
If it takes less than 2 minutes — do it NOW, not later.
Next Action
Always define the PHYSICAL next action: 'Call John at 555-1234', not just 'Sort out phone issue'.
Weekly Review
The backbone of GTD. Without it, the system breaks down.
06 Goal Setting ▼
SMART goals
Specific, Measurable, Achievable, Relevant, Time-bound.
OKRs
Objectives (qualitative, inspiring) + Key Results (measurable, 0-100%).
90-day cycles
12-week year: 12 weeks = 1 year of focus. Quarterly sprints vs annual planning.
Backward planning
Start with deadline → work backward to today. What must be done each week?
Habit stacking
Attach new habit to existing one: 'After I brush teeth, I will read 10 pages.'
Review cadence
Daily (today), Weekly (this week), Monthly (this month), Quarterly (goals).
Anti-goals
Also decide what you WON'T do. Saying no is essential to focus.
Gap vs Gain
Measure progress from where you started (gain), not how far from ideal (gap).
💡
Write goals as if already achieved: 'I am a person who exercises daily' not 'I will try to exercise more.'
07 Energy Management ▼
Ultradian rhythms
Natural 90-min high-energy cycles. Work during peaks, rest at troughs.
Peak performance hours
Identify YOUR best hours: morning (most), afternoon, or evening. Protect them.
Energy audit
Rate energy 1-10 every hour for one week. Find your patterns.
Physical energy
Sleep 7-9 hrs, exercise 30 min/day, hydrate 2-3L, nutrition matters.
Mental energy
Meditation, journaling, boundary setting reduce mental drain.
Emotional energy
Relationships, joy, purpose replenish. Drama, conflict drain.
Spiritual energy
Values alignment, meaningful work, contributing to something larger.
Recovery
Deep recovery (sleep, nature walks) vs shallow (scrolling). Prioritise deep.
💡
The highest leverage activity: SLEEP. 7-9 hours improves memory, mood, decision-making, and physical performance more than anything else.
08 Digital Focus ▼
COMMDigital focus strategies
PHONE:
  Delete social apps (check on browser if needed)
  Greyscale mode reduces dopamine pull
  Do Not Disturb during focus blocks
  Phone in another room during deep work
  App limits: 30 min max per category

EMAIL:
  Check at fixed times: 9am, 1pm, 5pm
  Email is NOT urgent — never
  Unsubscribe ruthlessly
  Inbox Zero: process to done/waiting/reference

NOTIFICATIONS:
  Turn off ALL non-essential notifications
  'Notifications are interruptions in disguise'
  You decide when to check, not the app

DIGITAL MINIMALISM:
  Audit apps monthly
  Intentional use: WHY before opening
  Tech sabbath: one device-free hour per day
  No-phone bedroom rule
⚠️
Every notification costs 23 minutes of focus to fully recover from (Gloria Mark, UC Irvine research).
09 Habit Systems ▼
COMMHabit formation systems
HABIT LOOP (Charles Duhigg):
  Cue → Routine → Reward
  Identify and modify any part to change habit

ATOMIC HABITS (James Clear):
  1% better every day = 37x better in a year
  Make it obvious: cue design
  Make it attractive: temptation bundling
  Make it easy: 2-minute rule
  Make it satisfying: immediate reward

  (For bad habits: invert all four)

HABIT TRACKING:
  Paper: cross off calendar squares
  App: Streaks, Habitica, Loop
  Rule: Never miss twice

IMPLEMENTATION INTENTION:
  'I will [BEHAVIOUR] at [TIME] in [LOCATION]'
  'I will meditate at 7am in my bedroom'
  This doubles follow-through rate (research)
💡
Identity-based habits: 'I am a person who...' not 'I am trying to...' The identity precedes the behaviour.
10 Mini Quizzes ▼
❓ Quiz 1
What is Parkinson's Law?
Parkinson's Law: if you give yourself 2 weeks for a task that could be done in 2 hours, it will mysteriously take 2 weeks. Use tight, realistic deadlines to counteract this natural tendency.
❓ Quiz 2
In the Eisenhower Matrix, which quadrant should you spend MOST time in ideally?
Q2 (Important, Not Urgent) is the secret to high performance: planning, learning, relationships, health, strategy. Working here PREVENTS Q1 (crises) from happening. Most people neglect Q2 because it's not screaming for attention.