There wasn't very much going on in London about five years ago, and I just took a ticket on spec and went to Los Angeles. I think it was in my second week that I auditioned for 'Battlestar.'
If you have an idea that seems worth doing, don't wait to hire other people and get funding and all those things. Just start doing it, wait to see what happens, and then iterate on that.
At that time I was making the largest salary known on television and I didn't want to see it die because those were the years paying off when I wasn't making anything.