You need to get more disciplined.Invalid Link Removed
Any type of stimulant ala green tea, caffiene, or ritalin etc. will help with concentration. If you do go with caffiene or any type of stim, make sure if you use it to study to take it before a test. The brain works in mysterious ways, it will file away the things you learn while studying with the aid of a stim, and the key to unlocking it later is to introduce the same stim again before you test.Invalid Link Removed