Here's an elaboration on the "ramp and bucket" trap:


5 gallon plastic bucket, drill two holes across from each other about an inch or so below the top.

Drill a hole in the bottom of a water bottle.
Slide a dowel through the bottle and through the holes in the bucket.
Put a couple inches of water in the bucket. Cold weather, add anti-freeze.
Prop a board from the floor up to the top of the bucket.

The mice walk out on the dowel, when they go to get on the bottle it will spin them into the water. Use a slotted scoop, like used for cat litter, to scoop them out.
They generally don't stink because they are in the water. I hate poison, as they go off to die in places that you can't find them and they stink the place up.
Relatively humane, too. Drowning can't be fun but it's not like being glued to a board and left to squirm until you die.

This has worked really, really well for me.