#7 - Carry an umbrella & a scraper in your car

It's probably a good idea to always carry an umbrella (or 2) in your car. You never know when it's going to pour down rain. Choose something with a fun pattern and it will make the rain more cheerful, plus it's nice to have one to share.

On another note, if you're renting a car and are in snow country in the winter, check to make sure they've included a window scraper for snow and ice in the car. Unfortunately, I didn't discover this in time this month back in PA when the storm began. Borrowing a broom can help, but is a little awkward.