4 Rules of Word of Mouth Marketing
Word of mouth or "buzz" marketing has always been a necessity for any business. But since tools on the web make it easier than ever to talk about a product it’s becoming vital. Look at Amazon reviews or yelp.com.
1. Be interesting, be remarkable –  Ask yourself, what have you got?  Create a 10 Second commercial for yourself.  
2. Make people happy – 
3. Earn trust and respect – 
4. Make it easy for people to talk about you –  What do you do? You talk about it.
You’ve got to collect email address and communicate to them. Email is just the number one way."