It's a simple process, and too many overcomplicate it.
Step 1 - Find people - you really want a starving crowd.
Step 2 - Offer them something they want, best if they are new, make it free or very low cost and very awesome.
Step 3 - Impress them, make sure what you offer them is amazing, and all the things around it are even better (Delivery, presentation, etc.)
Step 4 - Talk to Them, follow up via email, text, in your community, or however you plan to communicate with them. Build Trust, use your authentic self.
Step 5 - Give them an Out of this World Amazing Irresistible Offer
KEEP Going - Buy or Die... Friends for Life ... Keep giving them Value AND Sending them Offers!!