Get Things Done - Confidence is built on accomplishment. If you achieve small and big goals, you're going to feel much better about yourself.
Monitor Your Progress - The best way to reach your goals, big or small, is to break them into smaller goals and monitor your progress.
Stand-Up for Yourself - Logically you think, "How can I be right when this person and all these doubts in my mind are telling me I can't do this? That idea is stupid."
Think Long Term - The foundation of suffering is decisions made for short-term comfort that impede long-term goals: If you're trying to save money, you can't go out to eat.
Do more of what makes you happy - What do you like to do in your spare time? Is it to go out, hike, kayak, and enjoy the outdoors?