I remember the days when we lived in terror of magnets coming anywhere near our computers. They could destroy info on floppies and hard drives. Magnets in speakers that were too close to the monitor could distort colors something fierce. I had a friend who owned a print shop that had a pizza place move in next door. If the pizza oven conveyor belts were operating, her monitors were useless for color work. You could degauss the monitors once the ovens were off, but the minute they started running again, you were back to square one.
Not quite the same today. When Apple started shipping iMacs with remote control units in 2006, they embedded a small magnet in the lower right side of the monitor. It was a handy place to store the remote. I’m not sure when, but somewhere along the line, Apple started using magnets to hold the glass in place on the screen. They were in the black area around the top and sides of the screen. My current iMac is from 2009, and it has 7 magnetic areas around the screen, 3 on each side and 4 across the top. Last year they dropped the magnets in favor of a super adhesive, but if you have one of the magnetic models, you might want to take advantage of it. I keep all kinds of things hanging on my monitor. I have a bunch of tiny Altoids tins that are great for holding things like paper clips and push pins. They cling nicely to the screen edge.
The one thing I seem to misplace all the time is the little bitty charge/transfer cable that comes with the newest iPod shuffle. It’s not a 30-pin or Lightning cable. It uses the headphone port to connect. Thanks, Apple. Anyway, I found that the perfect place to store it is right on the monitor. It’s in plain sight, can’t be buried under that debris that seems to accumulate on my desk, can’t accidentally fall into the trash.