A lot of schools have switched from soda to juices and healthier offerings, so take advantage. Have a healthy breakfast to avoid distracting (and embarrassing) hunger pains and stomach grumbles. Junk food can be tempting, but it's not as filling. Try to opt for a fruit salad and sandwich for lunch instead of fries and a hamburger. You'll be surprised at how much it changes your attitude and focus in after-lunch classes.