On a less ragey note...
Hold on to the things you love. Hold them tight. Hold on to those things that you recognize as a part of yourself. If you have them, don't ever forget them. Keep them as close as your breath. If they're unrealized, make them reality.
I think a happy person is a collection of parts of things they love, always. Not just material things or even loved ones, but ideas, images, facets. Things that make you feel right and fill you with peace when you look at them. Those things can always be with you. They are you. When you feel doubt, don't give in. Fight back by remembering what you truly love, even if it only pleases or makes sense to you. It doesn't matter what anyone else thinks if you're happy.
For me? One image is being in a kitchen, wearing a beautiful apron and cooking up something yummy. Some kind of comfort food, like stew. The kitchen smells wonderful and I'm smiling. I go there and I feel right with my soul. I also feel right with my soul when I think about traveling and adventuring, especially the roads less taken. There are so many things like this, little things that are important to your sense of self in this crazy world of action!
So this is what I'm trying to learn. My own kind of self-therapy. Based on being yourself, in the most literal sense, essence, instead of trying to comform to what some manual says is normal. The key to happiness really, really does lie within you, and what you take and enjoy from what's around you. Celebrate those things with a quiet noise. Don't ever stop, or let someone convince you it's silly and unimportant.