Now, I've never had to fund a startup... but I've worked for a number of 'em, and I've considered (off and on) starting my own company; enough so that I did some research on funding, including reading Guy Kawasaki's The Art of the Start, Kenneth Hess' Bootstrap, and a couple of other books on startups. Oh, and of course, all the various web-based resources. All of them seem to make the same points, some in more entertaining (Kawasaki) and some in more narrative (Hess) formats. If you're looking for a quick and dirty, "Hmm... do I have what it takes, financially, to start my own company?" question, then this is a nice quick rundown - kind of a financing options checklist- of the various possibilities you may want to explore.