How can I study to get a proudly mark/rank in jee, aeee

Instead of choosing a random topic from the syllabus, you must break your preparation into sections. Sub-topics from each section should be selected and then strategy on clearing concepts must be made. Never leave any concepts doubtful or unsolved. Once done with the syllabus and concept clarity, you should move towards solving previous years papers. Give mock tests as much as possible. Time management is one more important thing you should look upon. Remember that practise will increase your efficiency.
Get the best books for Jee Main-
http://engineering.careers360.com/articles/best-books-for-jee-main
Careera360's Jee Main Knock Out Program is very useful and affordable for Every engineering aspirants.  It's a smart study material. Boost your preparation with our Jee Main Knockout Series-
http://learn.careers360.com/knockout-jee-main-april/