I’ve just read Bright Marketing by Robert Craven and he might not be able to answer the question for you but he really gets you thinking with some fast practical steps towards taking your business to the next level. One section he offers as a ‘buffet or a box of chocolates … a …help yourself approach…take as little or as much as you want!’

Definitely worth a read:
Bright Marketing – Why should people bother to buy from you? by Robert Craven 2007