Focus on solving the problems on your own, do not look for the solutions without attempting a question. Don't spend more time studying new things rather than revising the previous ones. The end result is that they mess up all the things the paper. So devote more time for revision. You will have to study at least 12 hours a day. Give mock tests and try to solve previous years papers.
http://engineering.careers360.com/articles/jee-main-preparation-time-table-for-1-month

If you have Doomsday notes please go through it.
If not then you can find it in many problem books like NEW pattern of Arihant.
Now you should only solve previous years questions.
And give as much tests as you can.
Giving mock tests would let you adapt to the situation of exam halls .
Learn from the mistakes.
Have proper amount of sleep and food.
Don't take pressure.
You would be fine.

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