Masher
Danesco double-action stainless potato masher, $6 from TableTools.com.
Hand mashers get a bad rap for leaving lumps, but I found that they can, in fact, deliver smooth, creamy potatoes. You just have to be methodical with your mashing method, getting into every corner of the pot and using a press and twist motion with the masher, adding a little liquid at a time if you must. (Be sure your potatoes are thoroughly cooked, too.) If you like the skins in your finished dish (for nutrition and texture), a masher or metal spoon is the only way to go. Don’t expect mashers to deliver light or fluffy potatoes, though.