All over the place! I have several sewing tables so I have duplicates in diff tables. The things I use most are just to the sides of the machine I am using. I also have a groomers caddy that stands about 3 feet tall with plastic slideout bins and it's on wheels. I keep that handy too!
My biggest confusion is small screwdrivers and wrenches get misplaced between thegarage and the inside machines!