After my first startup, I got a job at Google. After my second startup, I just founded another startup.

Part of becoming an entrepreneur - probably the most important part of becoming an entrepreneur - is realizing that the rules are just guidelines. People will give you all sorts of career advice - "never leave a job without another one lined up", "make sure you get a good raise every time you switch jobs", "don't call yourself a programmer" - but they're just telling you what worked for them, and in some cases it didn't even work for them. The guiding principle you should follow is "I'll deliver things of value to other people, and in return, I'll ask for things of value to myself."