Google Assistant. I had a smart clock for years but only now got the full benefit now that I've switched to Keep and Calendar for so many things rather than using various notes apps.

My Kobo Libra 2 reader has been great. Although sometimes I wish I'd bought a Kindle or waited for the Scribe, because Kobo books often cost more than Kindle books, and it seems like Kindle has better sideloading support now.

Wall mount hooks. Now that they have nicer looking ones with drywall anchors instead of the old eye hooks, I've found lots of uses for them.