Since planning my novel for Camp NaNoWriMo, I've been struck with ideas for another four novels, plus I've got many, many ideas for the next rewrite of another book. This is the most ideas I've ever had at any one time. Being creative has given me a rush of ideas.
My theory is that being creative opens up the creative part of your mind. You're thinking creatively, so you're ready to have more thoughts, ready to be hit with more inspiration. And once you start, those ideas are (hopefully) going to keep flooding in.
So my advice? If you want to be creative, go out and start thinking creatively. Because being creative makes you more creative.