Most of my "semi-free" days sound like yours, Indy. I am working 80% time and I went through a long spate of Wednesdays and Fridays that were taken up with extra meetings and sessions. I usually see 2 people late on Wed. and two every other Friday. The intention was to give me time for riding or skiing. That doesn't always work, but today was probably one of my best versions of an "easy" day: I drove 20 miles for a school meeting for one of my clients, it lasted an hour and 15 minutes of billable time, then drove back home (I get paid, although crappily, for my mileage). Put on a load of laundry, wrote up my notes from yesterday afternoon and this morning, and then drove to Acton and met a friend for lunch for about an hour. Then I went to get my nails done, went grocery shopping, and came home. Unloaded the food, more laundry while I read, did stuff online, and then started my dinner, which is a recipe that I don't have time for during most of the week. I am relaxed because I've had a balance of things, though a little heavy on household stuff, because I plan on x country skiing all weekend and DH came home much later than usual, so he wasn't here to do stuff. And, it was a rest day for me, as I hadn't had a day off from exercise in 10 days.
I do appreciate a weekend here and there with nothing (last weekend), but usually we have plans for at least one dinner out with friends and one active thing with friends.