I do a general neatening up, I guess. Why? Things lying around look sloppy.
I am usually good about taking the garbage out, but if someone's coming over, I may take it out before it really needs it. Why? To remove any smells, and because taking out garbage is the first thing I do when cleaning anyway.
The one thing I clean is the dishes. I rarely use a dishwasher, so things may be in the sink from an earlier meal. So those get washed when someone's coming over. Why? Same thing - to remove smells and that's a first cleaning activity.