I used a labelmaker and clear tape to print labels and make my own stickers. More info and a picture of the whole thing here:
I keep forgetting to use it! I made a spreadsheet and got some English frequency statistics to try to determine what multi-character sequence on a key would save me the most keystrokes, and the answer turned out to be the four-character combo "the " - using shift with it capitalizes the T.
I’m thinking of maybe switching it to a shift-ctrl-alt-win combo (a “hyper” modifier) or something.