Take up one idea. Make that one idea your life - think of it, dream of it, live on that idea. Let the brain, muscles, nerves, every part of your body, be full of that idea, and just leave every other idea alone. This is the way to success.
Fake feeling good. . . . You're going to have to learn to fake cheerfulness. Believe it or not, eventually that effort will pay off: you'll actually start feeling happier.