I have keep well-stocked on Avery 05422 removable white labels.
They're ½" x 1¾" in size, with rounded corners.
On the back of the TV and other electronic equipment, I've listed the power consumption running and in standby (I measured it).
On the edge of hard drives, I put the size and date installed.
On things with passwords, I put the master manufacturer's password, just in case I get locked out (I don't set my own, but you never know).
And of course the computers which do have logins, have a sticker nearby.
The router has the default IP and master pass, too.
On the back of clocks and inside remotes, I put the date of the last battery change (room for 6 or 8 on the sticker).
When I used to put up fixed dishes, I'd write the azimuth, elevation, and skew for the particular bird, put the sticker on the back of the dish, then cover it with a small piece of the 2" clear package sealing tape.
Now, I put a similar sticker on the BUDs, just to have the info handy if I need it.
Finding the exact coordinates for my house is never a problem, but maybe I'll add it to the sticker on the bottom of my FTA receivers, now! - :up
. . . and to the side of the Ku motor, just in case. -