I've been umming-and-ahhing over an entrepreneurial endeavour for a while now. I'm very tempted now to just go out there now and see if I can get a good domain name. Letting the domain make the business decision for me seems fun.
My personal advice would be: Get the rest of the pieces in place before buying the domain name. I've probably bought dozens of domains over the years with an eye to a specific Great Business Idea underpinning them, but for some reason the act of buying the domain seems to stall my interest.
They were all good ideas, not duffers, evidenced by subsequent pick up years after.
This is a potentially addictive and risky venture. I've personally bought hundreds of domains over the years, and professionally in the thousands. I've probably broken even or profited a little. Most of the domains I buy for the name just sit there unused for 5+ years.
I don't necessarily mean as a career path. More-so as an out-of-work hobby to keep me occupied. By buying a good domain name, that would probably give me the kick I need to do something with it!