Rejection Bites

I just found out that one of the contests I submitted for rejected me. Again. This is the tenth one I think since I started submitting seriously last year. They're all short stories. I haven't finished my novels yet. It's a bit depressing. But then I have to think about a writer like Stephen King. He had so many rejections - maybe more than 50, nailing them all to the wall - before Carrie was published. The man created his own household name, for crissakes!
So I have to keep writing and submitting. Maybe I should master the writing bit first...