Tip #1: More is more.  Why are traditional mousetraps are usually sold in sets of two?  Most experts agree that the most common trapping mistake is setting too few traps. One or two won't cut it.

To  increase your chances of catching mice, set up to 6 traps in the areas where you've seen mice in your home.  Place the traps perpendicular to the wall with the bait pedals facing the wall itself.