1. Establishing business credibility: customer contracts, awards, revenue, business plan etc. which shows it’s a real business
2. Paying market salary: having enough funding to pay market salary for the position for the duration of H1B or employment.
3. Establishing employee employer relationship: since H1B is a work visa you should demonstrate employee relationship with your company. Having a minority stake, setting up a board that has ability to fire you etc. helps.