Start working on your language and communication ability. For this you must read a standard national daily newspaper and news magazine on daily basis, this will increase your general awareness about current affairs.

For better spoken expression, watch english news channels and while reading newspaers record your voice and listen to know your improvement and where you are lacking.

if you are self-conscious, read newspaper standing in front of mirror for 15 minutes daily.

and prepare for CAT/GMAT/MAT exams. solve sample papers on regular basis.