Millions suffer in silence as the freakin' MagSafe magnet in Mac notebooks turns out not to be strong enough, so every time you shift on the couch it falls out. I don't know if you have this problem, but many of us are very frustrated that the magnet is not as strong enough as it was in the old days.
There was a successful Kickstarter thing called a Snuglet. It's a shim, it looks like a staple. This tiny liner for the MagSafe jack, through some miracle of physics, amplifies the magnetic grip of the power plug so that it does not fall out unless you really kick the power cord or trip on it or something, which was the original idea. — David Pogue
This is from the Cool Tools Show podcast with David Pogue. See all of David's picks here.