I honestly believe that the "small" changes make the biggest difference but I honestly believe that changing diet and meditation are quite big changes and parts of the base of a healthy happy life. If you use a bit of that discipline that helps you to cycle for this things you are good to go!
Watching the documentary you are what you eat(twin experiment) on Netflix might also help for that little bit extra motivation :)
I personally have always walnuts and pumpkin seeds close for when I need to eat something.
RE: Time Flies When Having Fun!