When we interviewed folks for the TechCrunch50 show this year, we asked them how much was invested in their companies. Many reported nothing. Zero. They had no office space, no server farms and no Oracle license. No marketing budget, PR firm or headhunters to feed. The cost of a pure, boot-strapped, startups today is really the time the founders put into it. Don’t pay for software, don’t sign an office lease, and don’t hire a PR firm. Stay slim, build something great and wait. If it doesn’t grow make the product better and wait some more. Keep that process up until you find something that makes people absolutely rabid for your product. If you can’t find something that delights folks, well, then you suck. Give up.