Make it Big. No, Bigger! Nine Steps to Opening a Store in Style
Tease people’s curiosity by offering a mystery gift or a surprise guest. The words "free" and "mystery" are always a good idea. limit the number of gifts, but keep it reasonably large: for the first 100 customers, for example. That won’t bankrupt you, and 100 is a big enough number that people will figure they’ve got a chance.