Since everything is close by, I use my bike for 80-90 percent of the trips to the hardware store, grocery store, dollar store, post office, bank, meetings, etc.
I have looked at the photos of milk crates and cat litter boxes, but the former is too tall and the latter is just a little too utilitarian. I just wanted to share how this shopping basket from a certain home improvement store works so effectively on my Blackburn rack. It's held in with a single matching bungee cord and pops on and off effortlessly. Stable enough for 13-15 lbs of groceries. The red is a little flashy, but looking for a green basket to match!