Zardowally writes (re-posted from comments):"A few observations from the mouse-hunting battlefields in Philadelphia
1) Don't give up. It is when you have just about given up, but don't, that you will snatch victory from the jaws of defeat.
2) On a similar note, there is a psychological element to this business. You will never catch them all--instead, you must break the spirit of your fury foes. They must conclude: "The losses, the travails, the discouragements, are not worth the warmth, foodstuffs and other comforts of this gentle home. We must retreat."
3) Children make this tougher--your tykes will leave a literal smorgasbord of dainty morsels spread around the house.
4) Children also add something primal to the battle. These googly-eyed ghouls compete for your children's food, they manouver without shame among their toys.
5) Kids can also provide just the encouragment you need to stay the course--when my 2-year old spots me trap-setting, she slaps her hands together in dramatic fashion and exclaims excitedly "All done mouse!"