I like to have most of my items priced with tags either tied or pinned on. If I have a large quantity of a certain item I'll make a sign with the price. When I'm at a craft show I hate to have to ask the vendor the price of an item.
Don't feel bad when someone says "nice work" and then walks away without buying.
make up some cards with your contact info. I've gotten some good customers from them picking up my card and contacting me later.