i got in cat 62.9%, i want to give cat again in 2017 . plz give me tips d information about notes

Hi, I understand your query. Your academics is not that great as per selection criteria in many management institutes. Also you will have to really work hard on your overall CAT profile and percentile to get into top b schools because of lack in school academics.
Also just do not rely on one exam, give as many you can like MAT, CMAT, XAT, May MAT etc.
Take coaching if you are unable to do it by self. That is okay.

Some of the tips to prepare for CAT/MBA exams are:
1. Now that you are already aware about the syllabus, focus on the revision.
2. Having more books is not a point, focus on few but standard books.
3. Give a full swing to test series and mocks.
4. Analyse your weak and strong areas and focus on your each and every point.
5. Do not skip any section. Work on your difficult sections.
Work Smart!
All the best.