The thing to keep in mind, when you are contemplating a bahavior change, is that your behaviors are part of what makes you you. To change any one of them will change who you are.
It might be a small change -- like choosing a smaller latte in the mornings.
Or a bigger change -- like my decision that I might enjoy wearing fun colored/patterned socks instead of just plain white ones. :)
If you're not willing to change who you are, you aren't going to be successful changing what you do.