Short answer: Build the sheet while you study each topic, not at the end. Keep one page per topic with formulas, conditions of use and one worked example.
Why a formula sheet helps
GATE covers a lot of material across many subjects. A compact sheet lets you revise key points quickly in the last weeks instead of rereading full chapters. It also forces you to understand which formula applies when.
What goes on each page
- The formula or result in your own words.
- The conditions under which it is valid.
- Common traps, such as units or special cases.
- One short example that uses it.
Build it as you study
After finishing a topic from your textbook, write its page straight away. Writing later means rereading, which takes far longer. If you need a refresher on using your college textbooks for this exam, see using college textbooks for GATE.
Test the sheet with questions
Attempt previous year questions using only your sheet. Where you get stuck, the sheet is missing something. The approach in using previous year GATE papers with your textbooks pairs well with this.
Paper or digital
Either works. Paper is better for sketching diagrams, and digital is easier to edit and search. Choose what you will actually open daily. Check the current GATE rules for what is allowed in the exam hall, since the sheet is for preparation and not for the exam itself.
After the exam
When your preparation is done, sell textbooks you will not need again through the GATE books page and keep your sheet for future reference.
Common mistakes to avoid
A common mistake is copying every formula in the chapter. A sheet that long is just the book again. Include only what you cannot quickly derive or have trouble remembering, and keep the rest in the book.
Another is listing formulas without their conditions. Many wrong answers come from using a correct formula in a situation where it does not apply, so the conditions are often the most valuable part of the page. Review the sheet at fixed intervals, for example weekly, so that older topics do not fade while you work on new ones.
Frequently asked questions
When should I start making the sheet?
Start as soon as you finish your first topic, and add a page for every topic after that.
Can I take the formula sheet into the GATE exam?
The sheet is for preparation. Check the official GATE instructions for what is permitted in the exam.
Is paper better than digital?
Neither is better in general. Choose the one you will open every day.