[mootothemax]

I think saying, however sarcastically, that if it was that easy, everyone would be doing it is kinda pointless. The most important step is to get started in the first place.

Even if you don't make huge amounts of money (disclaimer: that's my blog post linked at the bottom of the answer), there's a huge gulf between those that spend their days thinking about possibilities, and those that get up and start their projects. If you're in the latter group, you stand a much greater chance :)