Hi
These are some tips regarding Inorganic study.
1) You have to Have a table or a notes about the various properties of the elements and compounds.
You should know the concepts of bonding, molecular orbital theory Correctly.
Memory of these facts are important.
Numerical problems should also be given Impportance.
For Organic
1) The foundation lies in uderstanding the hybridisation , mechanisms like SN2, etc Thoroughly.
2) About the nature of compounds like Electrophilic, Nucleophilic, Leaving groups, etc
3) Named reactions and their Mechanisms etc.
Altogether Refer some good organic boooks like " Interactive organic chemistry and Concepts in Inorganic chemistry or Arihants inorganic chemistry.
Systematic study will surely yield good results.
Good luck!