When I am in my car (ahem, as a passenger, of course), I like to have a list of things to do when I am in my car (ahem, as a passenger, of course). Instead of muddling through my complete list, I have a smartlist called "windshield" which includes all tasks that are due or overdue that include "did" "call" "go" "Pick up" "visit" or "Hear" (as in Did I hear from Bob ?. It also includes items tagged with windshield or errands. Items with these words in them are easily done while in the car.

Even better, when using the webapp on my iPhone I made a shortcut to that specific search and added it to my home page. Now it's only 1 click to my windshield list.

For those interested, here's what the search looks like:

(tag:windshield or tag:errands or name:call or name:check or name:go or name:heard or name:did or name:visit or name:call or name:did) and dueBefore:now and list:InboxEdit