I do any time I'm going to be around people for an extended period of time or around a large crowd. Concerts, long grocery store trips on a Saturday, in-office work days (I work hybrid now ๐), I'll put on on a mask. If I'm just running into the store to grab a gallon of milk because we're out, then I won't wear a mask.
My wife legit almost died from Covid, and it took her about 6 months to return to normal, so we are a little overly careful.