JB Weld is magic (as is it's competitor PC7, seems to be the same stuff). I just used it to fix an iPad keyboard - the part holding the iPad cracked near the hinge. Just filled the interior with JB and reassembled (it squeezed some JB out). Crack is still there, but the hinge area is even more rigid now. Of course it'll never come apart again.

I'd like to promote Goop. It's like a super thick rubber cement. There's very little it won't stick to. Very strong. It's pretty much all I use anymore. Oh, and it peels right off when you need to remove it (though it takes some effort).

I've glued phone mounts to the dash with it. Power strips to the underside of the desk. Glued laptops back together when the screw mounts break. Use it for the metal disks on back of phones for magnetic mounts. It's holding L-brackets to the back of the TV so I could put the soundbar on top. Also a bunch of industrial Velcro (the thick plastic stuff) on the back of the TV to hold a wifi router, Bluetooth adapter, USB hub, power supplies, and cable management.