I always wanted to join my mother when she ran errands as a kid. There were so many fun things to do! Now, as an adult, running errands have lost their luster.
You can research and find a shopping strip with the most locations you need and do your shopping there. Get as much done in one spot as possible, even if it costs you more.
You can plan your actual shopping trips. Many stores have apps that can tell you where in the store items are located. Make a list and plan the store you need to go.
If you take public transport, you can send emails, make lists, make calls, send texts, and otherwise do administrative tasks. You can even order items online and save yourself time.