We all forget too easily: the best startup funding is sales. Sure, angel investment, friends and family, SBA loans, all of those options are necessary for most startups. But sales is better.
If you can, find the early customers. Give them a deal, make them important, work with them to optimize their needs; but make a sale.
Even if you need to go out and find investment — and I speak now as an actual angel investor — there’s almost nothing as convincing as actual sales. People are spending money. It makes a new business proposal far more credible.