My friend asked me what I did the other day. I named work and about ten errands. He knows me well, so he asked “I suppose you’re going to tell me that today wasn’t a busy day.” That’s exactly right. I explained that it wasn’t a busy day because I had time to do all those errands.
There are days where the little side projects have to be left on the side, since scheduled stuff comes first. I consider those busy days. Most days are not busy, even though I am doing something the whole day.
It’s all how you look at it, as with most things. If I’m going to wander around complaining about being busy, then my brain with think it’s being punished. If I think, “oh, I have time to do this or that”, this is just taking something off my to-do list when I can. Not stressful, not busy.