1. Get enough sleep:
2. Avoid late night high-fat meals
3. Eat breakfast: 
4. Try moderate caffeine
5. Keep your body hydrated:
6. Prevent dips in blood sugar

via msnbc

1. Move your body.

2. Know your energy highs and lows.

3. Learn the art of self-observation.

4. Listen to music.

5. Take a nap

6. Socialize.

via findarticles

1. Change your socks for refreshment.

2. Rock out loud.

3. Get rid of the stuffy nose.

4. Work with your body’s clock.

5. Have a piece of chocolate.

6. Have an afternoon power snack.

7. Hit up the water cooler for inconsequential banter.

full list via zenhabits

1. Eat lean protein.
2. Choose whole grains.
3. Skip the caffeine.
4. Exercise regularly.
5. Get adequate sleep.
6. Try something new.
7. Don't stay sitting.
8. Try aromatherapy.
9. Reduce stress.

via about.com