How to encourage someone to save money?

At the end of every day, throw your loose change into a tub; that's anything under �1. You'll be surprised just how much that builds up too. I have done this for years (although I cheat a little as I include anything I win in quizes or the unused fare if I walk home from a night out rather than catching a bus). The most I have saved is about �400 and that has paid for a 'booze cruise' (North West England to Calais, hotel, ferry and some of the booze :) )