There was another post just like this below this one so I will post what I said there.

Just keep yourself in good shape by working out, eating right, and practicing keeping your body well taken care of. You will feel different and over time it can make you look different in a positive way.

One big thing is what you eat. I used to feel like crap all the time not because I had gotten fat from eating to much, I have never been fat. Instead it was because my body was not getting everything it should have been so I was feeling down and sometimes just out of energy. Just try eating well and see how you feel. Less sweets to. I do not even drink soda anymore since I got used to other things and now they taste good to me and soda taste like crap every time I drink it.

ADDED: For me it just feels like I got a lot of energy and a positive outlook all the time. I can get up easily at 5:00 in the morning now and not 12:00 in the afternoon like normal. I even got the energy to make breakfast for the family and try cooking different things sometimes. That is a big one since before changing my diet, I hated cooking. Also by working out some I put on some muscle without a big workout routine because of my good eating habits. I know it may seem like a bunch of bs reading text, but it really has made a huge difference.