Reading - what a wonderful way to become informed and have fun at the same time. Reading is one of the most relaxing exercises you will ever do. So go ahead, pick up a book or some reading material and have some fun.
Travelling - Have you discovered the world as of yet? It's time to get out and get to know the world in which you live - even if it is just your neighborhood. Go for a walk, or just a drive or somewhere you always wanted to visit. Get out and go.
Listening to music - helps anyone to relax makes you feel happy. Try it.