How to Use the Last 100 Days Before UPSC Prelims Effectively

How to Use the Last 100 Days Before UPSC Prelims Effectively

The last 100 days before the UPSC Prelims can make or break your chances of clearing the exam. This is the time to revise, practice, and refine your strategy. Below is a structured plan to maximize your performance in the given time.


πŸ”Ή Key Principles to Follow

  1. Revision is the Priority – No new books or notes; revise what you have already studied.
  2. Practice More than You Read – Solve daily mock tests and analyze mistakes.
  3. Eliminate Weaknesses – Identify subjects where you lack confidence and focus on them.
  4. Time Management – Strictly follow a daily study schedule.
  5. CSAT is Important – Do not neglect CSAT, as it is qualifying but tricky.

πŸ“… 100-Day Strategy for Prelims

The 100 days can be divided into three phases:

πŸ“Œ Phase 1: (Day 1–50) – Intensive Revision & Subject-wise Focus

  • Revise one subject per day and finish 2-3 subjects in a week.
  • Solve previous years’ questions (PYQs) after revising each subject.
  • Make short notes and mind maps for quick revision.
DaysSubjects to FocusAction Plan
1-7PolityRead Laxmikanth, revise notes, attempt 50 MCQs daily
8-14HistoryCover Modern (Spectrum), Ancient & Medieval (NCERTs), Art & Culture (Nitin Singhania)
15-21GeographyCover NCERTs, GC Leong, Mapping
22-28EconomyFocus on NCERTs, Economic Survey, Budget, Current Affairs
29-35EnvironmentCover Shankar IAS Book, Government Reports, Current Issues
36-42Science & TechRevise current affairs, government schemes, and basic NCERTs
43-50Full-Length Mock TestsTake 4-5 full-length tests and analyze weak areas

πŸ“Œ Phase 2: (Day 51–85) – Full-Length Tests & Intensive Current Affairs

  • Solve at least 25 full-length tests (1 test every 2 days).
  • Revise Current Affairs (Past 1.5 years) from monthly magazines & newspapers.
  • Focus on eliminating weak areas (Based on mock tests).
  • CSAT Practice: Solve 1-2 CSAT papers per week.
DaysFocus Area
51-57Revise Polity + History + Geography
58-64Revise Economy + Environment
65-71Revise Science & Tech + Government Schemes
72-78Current Affairs Marathon
79-85Daily Full-Length Mock Tests (Analyze mistakes)

πŸ“Œ Phase 3: (Day 86–100) – Final Revision & Exam Simulation

  • Do not study new topics.
  • Revise your own notes and quick summary sheets.
  • Solve at least 5-7 full-length mock tests under exam conditions.
  • Focus on high-yield topics and previous mistakes.
DaysAction Plan
86-90Full-length Tests + Error Analysis
91-95Polity, Economy, Current Affairs Revision
96-98High-Yield Topics Quick Recap
99CSAT Final Revision + Light Reading
100Relax, Sleep Early, Prepare for Exam Day

πŸ›  Tips & Techniques for Each Subject

πŸ“– Polity

  • Revise Laxmikanth’s important chapters (Parliament, President, FRs, DPSP, Amendments).
  • Solve previous year questions (PYQs).

πŸ“– History

  • Focus more on Modern History.
  • For Art & Culture, revise Buddhism, Jainism, Architecture, Literature.

πŸ“– Geography

  • Mapping is crucial – India & World Maps.
  • Revise climatic regions, rivers, monsoons, vegetation.

πŸ“– Economy

  • Focus on budget, economic survey, banking, monetary policies, inflation.
  • Revise important economic terms.

πŸ“– Environment

  • Revise National Parks, Biodiversity Hotspots, Climate Change Treaties.
  • Solve previous year environment-related questions.

πŸ“– Science & Tech

  • Focus on space, biotech, AI, cybersecurity.
  • Cover current affairs-based science.

πŸ“– Current Affairs

  • Any Current Affairs Magazine for 1.5 years.
  • Revise government schemes, reports, important events.

πŸ“– CSAT

  • Solve basic math and reasoning questions daily.
  • Reading Comprehension is crucial.

πŸ’‘ Golden Tips for the Last 100 Days

βœ” Study Smart, Not Just Hard – Prioritize high-yield topics.
βœ” Mock Tests are Key – Solve 50-100 MCQs daily.
βœ” Analyze Mistakes – Do not just attempt tests, learn from errors.
βœ” Optimize Time Management – Stick to the study plan, minimize distractions.
βœ” Keep Health in Check – Exercise, meditate, and sleep properly.
βœ” Avoid Negativity & Panic – Stay confident and trust your preparation.


⏳ Final 24 Hours Before Exam

❌ No new studies.
βœ… Revise quick notes, formulae, and key facts.
βœ… Sleep early (6-7 hours minimum).
βœ… Stay calm, avoid last-minute panic.


🎯 Summary

βœ” First 50 Days – Subject-wise revision & topic-wise MCQs
βœ” Next 35 Days – Full-length mock tests & current affairs
βœ” Final 15 Days – Quick revision & exam simulation

By following this 100-day strategy, you can maximize retention, improve accuracy, and boost confidence for UPSC Prelims.

πŸ’― Success is in your hands! πŸš€ Stay disciplined, stay consistent, and you will clear Prelims with flying colors!

PS: You can add changes as per your level of preparation or as per your need.

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