The first link that I found that describes making bucket traps (with peanut butter as the bait):https://answers.yahoo.com/question/index?qid=20081108214123AA1lXAc
Here is a cute page of suggestions, including using flour around treats on the floor to get a paw print trail (not actually practical in real life but a good way to know that a treat lure has been hit): http://thehamsterhouse.com/hamster-info/find-lost-hamster/
