I came to the same conclusion a few years ago. I have the tendency to hold onto everything, even things I don't like simply because I might need them later on. I finally decided that I wasn't going to let "things" have control over me. If I don't like something, I will put it away for a few months and then pull it out again to look at it with fresh eyes. If I still don't like it, I'll throw it out or I will give it away if I think it will be of value to someone else. It is a very "freeing" feeling to not let our projects control us.