If you are planning to travel - even if it's just a stay-cation up to Door County - you do not want to be without these helpful items.  
Lang Travel Mug: check
Cellphone Holder/Stand:  Check
Polarized Cut-the-Glare Visor:  Check
Angel View Wide-Angle Rearview Mirror: Check
Fun to travel with Dominos game: Check
Pocket journal for travel notes:  Check!
Stay hydrated.  Secure the cell phone. See out the windshield and cut the sun and glare.  Get a wider view of what's behind you!  Then let the passengers have some fun too!!