Follow your instincts and try to set your own standards. Define the type of photography you are interested in and concentrate on it. Shoot a lot of images. And don't be afraid to make mistakes. I have learned from mistakes because they sometimes bring better results than you might think.
Timing is important.
You have to be ready with your equipment. It's like fishing. You have to be ready or you can't catch a fish. Sometimes you're ready, but the fish just aren't there. Other times you cast and there's a surprise at the end of your hook.