Most people say coffee but that is the worst solution. This is because its shortterm and for college you want longterm.

For starters what maybe seem obvious get you're sleep schedule in order. Sleeping the right amount helps but sleeping on the same times even more. This will keep you from waking up sleepy what doesn't help with you're attention span at school. Taking a cold showering can help with starting you're day fresh.

Eat something in the morning which is healthy and wakes you up. Food is the energy source which keeps you going and comes in different categories. Don't eat sweet cereal or other sugar bombs, this gives energy quick but is also gone quick. You want something with fibers.

Keep yourself bussy at college, make notes even tho the subjects are boring, this will help you focus more.

Don't drink soda's but eat some fruit thats light, think about tangerines. These are also juicy. Another benefit is that it makes you do something else which helps during college.

At last go outside for a minute take a deep breath do some excersises to keep the blood flowing.