Thanksss alot !!! Bt I m trying to do that... Bt while studying my mind divert alot.. something i think i will do  physics bt after 10-15 mind divert nd says that do chemistry.. i m confused alot..nd  in that confusion time passes..

You already know what is distracting you and wasting you and nothing is better than that.Now when you know your obstacles just kick away them.Ibsuggest you should make a pattern and a time management schedule and divide equal time for all the subject according to your requirement.That will help a lot.
Do remember that you should try and set small goals first and then achieve them.