You've gotten an interesting, mixed batch of answers to your question.

Here's what I would personally do:
1. Think of a skillset that you posess, or would like to develop, that compliments your venture and what business you plan to do. (Consider the role you plan to hold in the venture down the line.)
2. Get a job that actively engages that skillset (for example, if you think sales is that skillet - perfect, get a sales job and get the experience & development you need, while being paid for it and making ends meet.)
3. Apply your newfound experience and cashflow to supplement your venture.

I'd love to continue the discussion on a call and hear about your personal situation.