Hi!

For Preparation of any kind of Competitive exam , not only UPSEE , You need to follow the following steps from the very beginning of the preparation:

1. Notes : Study each and every chapter and make proper notes of it . Which will help you in revising later
2. Make a proper Time Table : make a suitable Schedule of studying and Study accordingly.
3. Practice Mock tests : this is the most important part . You need to give a lot of mock Tests to get an idea about the exam and its pattern of questions.
4. Time management : This is also and important point.  Time Management is an important aspect which you need to keep on check in any type of competitive exam.
5. Previous Year Question papers: This will help you to understand the Exam pattern and question analysis.

Hope this Helped:)