If you have a defeatist attitude about it, you will prove yourself right. Obviously, you'll never escape it if you convince yourself you can't. First step in doing anything is convincing yourself its possible. It has always helped me to think about all the things I'm thankful for. I love laying in the bed because I'm warm and relatively safe there, I contrast it with the thought of what it is like being cold and on a dangerous street, and I take relief and joy that I am not in that situation. I can find tons of little things to be happy about, and anytime I need to, that's what I do. Making myself stronger helps too, exercise is a natural anti depressant, gotta get those natural endorphins flowing! But honestly most people don't start exercising because they try WAY too hard at the beginning. You gotta start small and just dedicate time to doing something easy on a regular basis. Go for a walk once a day for a week, and just dedicate the time, don't kill yourself jogging at the beginning. Eventually after enough days, you'll decide to walk farther, or faster on your own. Its more about time dedication and consistency than it is about diving in head first.