extrA Tips:
Make sure to download your music playlists, movies, and map/navigations with plenty of time before your departure, as these can take a while to download.
I have ended up in a situation where my Maps app closed on me and I was on my way to a trail in an area with no service, so it's very important to make sure you have access to a map at all times for your safety and peace of mind. As far as entertainment goes, many of the streaming services we use allow you to download videos and more for offline usage, including Youtube, Pandora, Spotify, Netflix, and more!
Make sure to prioritize the items you need on this list each road trip. A cramped car full of extra stuff is no fun, and the whole point of this list is to make sure you're happy and comfortable on your ride.