The big thing to make sure you do this holiday season is to offer folks the option of buying a gift card or gift certificate. Billions were spent last year on gift cards. When you use this you also get two customers instead of one (the person who buys the card - and the person who redeems the card). You can find a ton of vendors (check the paid links) by searching Google - click here.
Make sure to price shop to compare rates etc. If you can't take advantage of it for this holiday season, make sure to put on it next years "to do" list.