1. Smile at people. It's catchy.
2. Help someone. Do good. Feel good. You will thank yourself later with how good you feel! And when it works...tell them to pay it forward --words to live by. I know you're thinking "Pay it forward" is totally cliche since the movie came out. I don't care. I love the idea of paying it forward and if I have to be the start of such a movement...so be it.
3. Educate yourself on crappy food. ~grin~ you didn't expect me, with my very open hatred for all things 'poison' in our food, could have three tips and not mention this one, did you? Really? Eating Whole Real Foods....changes the way you think and look. It's good all over, why wouldn't you do it?