Last year I started working less for even more money. Another company wanted to poach me, so my boss had to make me an offer. Went down to a 32 hour work week with Fridays off while also getting a significant raise, so I stayed at the company. He didn't like it, but there wasn't much of a choice because we're severely understaffed.

Let's see if I can do this again this year. Not working less hours (32h is fine), but getting an even better offer.