Hi there,

First of all make plan that what are you going to study,for how many hours you are going to study a topic and on what you will focus on. Plan all these things so that you don't get distract while studying. Then maintain a timetable and follow it .

We all have same working hours but we don't utilize them properly so start utilizing your working hour according to your mental energy .

Always study in a peaceful environment so that you can learn more in less time that means effective study .

Now if you are talking pparticularly about commerce then you can divide subjects into two part

(A) Numerical portion: First clear you concepts and after that practice as much as you can for Numerical.

(B) THEORY Portion: Make notes and clear your concept and revise them.

Try to understand instead of just mugging up lessons so that you can remember it for long time .

And last but not least study with enthusiasm. Enjoy study . Don't take study as burden.

Hope it helps you.

Good luck!