When you go for a walk go over as many ? boxes as possible! When you get home only 
keep 1 of each toy except for food. e.g. if you have 2 tennis balls sell one in the
second hand store. Eventually you have a lot of toys. Also, make sure you practise 
at the gym, with your dog, and to enter agility contests because they give away the
most money! Plus don't shop in the pet supply shop buy stuff in the discount store,
sometimes you can get the things 1/2 price!