As you want to get the tips for the preparation of exam of Graduate Record Examinations so here is the information of the same for you:

Familiarize yourself with the overall format of the GRE Exam.

Take as many GRE practice tests as possible.

Review the directions for each section of the test before you take it.

Be aware of the time frames allocated to each section.

Familiarize yourself with the question formats for each section.

Focus on GRE vocabulary.

Review basic math

Try solving a few logic puzzles