Following are the tips : 1) Strengthen all your concepts in numbers systems thoroughly. Be very clear in highest powers in a factorial, remainder theorems like Euler's, binomial remainder theorem, LCM models etc..
2) Be very strong in functions and cyclic series
3) As far geopetry is concerned, focus more on circles and on mensuration
4) Solve lots of questions on time speed distance with a focus on circular motion
Cover the above preparation up by doinng topics like selections, permutations, venn diagrams...and then practice, practice and practice..