I’ve been using an Elgato Stream Deck for more than a year now. It’s a USB peripheral that offers a grid of buttons with a display underneath, so each button can be labeled with an icon and/or text that you specify. The goal of the Stream Deck is to make esoteric actions on your computer easier by letting you place them on dedicated keys with custom artwork, so you’ll always know to press the blue button instead of typing Command-Shift-Option-3.