The greatest thing you can do for your body is to eat healthy foods. Eating a variety of fresh foods in all colors, flavors and textures will help you feel more alive! If what you are eating was recently alive, you will feel alive when you eat it. If it has been in a package on a shelf in a store for months and months (in other words, dead), chances are you will not feel very well after eating it.
Avoid the center aisles of the grocery store. That is where all the packaged, processed and canned things are that are bad for you. Shop the perimeter where there are fresh fruits and vegetables, dairy and frozen foods. (Fresh is better than frozen, but frozen is better than canned.)
Also, try to get 7 to 8 hours of sleep every night. When your body lacks sleep, it will crave carbs to keep it going. This leads to making bad food choices.