This weekend, I urge you to take advantage of the cooling temperatures when you take care of your weekend business and literally run an errand.
Need to return books to the library? Put them in a backpack and run there. Imagine how easy the run home will be with no books loading you down. Need to drop off some dry cleaning? Run your clothes to your cleaners. I have learned from experience that it is easier to run to the cleaners with dirty clothes than to run home with clean, pressed shirts. If running is not your thing, try walking your errands or even biking them. Just get physical, burn some calories, cross items off your to do list, and lessen your carbon footprint. Another thing about "running" errands, no need to look for parking!