Recently got a motion detecting LED strip. Works great in dark hallways since I can never find the darn light switch in the dark. It's such a simple thing but helps out so much.
I've also discovered a tool called the "Drain weasel" that is fantastic for small drain clogs, though after seeing the design it's basically velcro on a stick. I was honestly surprised how well it worked but will likely use velcro on a stick in the future. Drain weasel is cheap anyway but doesn't seem recyclable, which is too bad.
A wedge pillow is fantastic for reading in bed. I'm glad I finally got one, though the one I got is a bit too skinny.
Anyone else have their favorite gadgets that work better than they expect?