When I work from home I get out at least once a day, run an errand, etc.
Once a week I get three potato soft tacos from T Bell...two for lunch and one for the next day. They are great for reheating with leftovers inside - I'll even stuff them with pasta
I round up to the next dollar amount and add another dollar. Makes them happy, makes me happy. I worked in food service in HS and college so I am a bit of a softy in the tip/no tip department.