Which are basic method which we can follow in entrance exams?

All entrance exams require alot of practice with mick tests and identify your weak areas. Giving many mock exams gives you confidence in cherrypicking questions which can be attempted in limited time with accuracy. Reading question with relaxed mind is very important as many questions have redundant data given for confusion. Clearing sectional cutoffs is very improtant as exams like CAT and NMAT have equal weightage on all sections. Sectional cutoffs are very critical and requires lot of practice on weak areas where you see your scores are low and maximum time istaken to solve. You can refer to sectional weightage for each chapter such that you can prepare with strategy and eliminate your weak zones. Solve LR with many puzzles, Sudokus, riddles to gain speed and smart thinking, for Verbal Ability take up flash cards and book by Norman lewis for word power, For quants simply practice as much as you can and always read daily newspapers to gain good reading and listening skills. All the best.

Practice to quicken your calculations, thought process to solve questions and you'll make it.