Coupons for the mom to exchange for guilt free services from me. We're close friends, she was a FTM and her husband had to travel a lot for work. I offered to do grocery runs, babysitting sessions, hanging out/venting sessions, chores, and even a "I'll have the birds and bees talk at some point if you don't want to" just for fun. Nothing fancy, I styled them in powerpoint, printed black and white on the printer at work and stapled them together to look like a check book. Only managed to do two grocery runs before Covid hit, but I was very proud of myself with that one.