1) Define in a few words what's your product value proposition: a compelling offering will help clients quickly understand your service
2) Clients: build trusted relationships, avoid car-salesmen type approach. Clients come to you so you can solve their problems easily.
3) Become the trusted advisor: you have the expertise in your field and product and work in the best interest of your clients
4) Be ready to sell under your costs: cold-start is a tough problem to solve, your first clients are the toughed to build, foster and grow a base and you'll be rewarded in the long run.