Got to thinking about what is my favorite doodad and, more specifically, which of my newer items is my favorite. Things that weren't possible or available for the home kitchen a few years ago.
I think today my favorite is the silicone oven mitt:

They come in a variety of lengths and colors. It's waterproof and will protect your hand from direct heat, charcoal, boiling water and hot oil up to 500 degree F AND it's dishwasher safe. Just stick it in with a load of dishes (I stand mine up on the prongs of the lower rack). It comes out "squeaky clean". No more stained oven mitts. No more dangerous holes or thin spots that leave your hand vulnerable.

I also like the silicone handle covers. They're perfect for slipping over the handle of your big, heavy cast iron skillets!
The flat silicone pot holders are nice and make great trivets, but I prefer the oven mitt because I've been burned a dozen times too many and need all the protection I can get.
SOOOOO, what's your favorite gadget of the 21st Century?
Lois