It takes time to spread the word about your startup and find early-adapting clients. But there are low-cost ways to build a following as early as Week 1 (that doesn't involve purchasing ads or billboard space).

In this Google Hangout, Dorie Clark, a business professor at Duke University and author of Reinventing You: Define Your Brand, Imagine Your Future, discusses how to lock-in customers during your first seven days in business.

Related: How to Win Clients Your First Week in Business