These can come in all shapes and sizes. They can be large-scale public events offering great profile raising PR opportunities and a chance for your supporters to play a hands on role in helping your charity or they can involve discreet, intimate cultivation of heavy weight potential donors and sponsors.

They can, and should, make you lots of money. But how do you make sure that all that effort is worthwhile?

Will they deliver the cash, or cost you an arm and a leg?