Low motivation?

ok here's the problem. I basicly have low motivation and no direction. I've been in and out of comm college since 2001 and still havent found out what I want to do. I have a lot of interests such as writing, biology, psychology and history. I know that having a degree means more money but I still havent found my direction. Sometimes I get frustrated with the time it is taking, other times I wonder if what I picked is really what I want to do. any advice