8. Battery Pack
If you're reading this and under 30, you probably feel the need to Instagram/Tweet/Facebook every single part of your trip. If you're over 30....I don't know, we're all too immature to act like real adults but I'm sure you have to check in with someone to let them know you're ok or heading home or something. Either way, having your cell phone or bluetooth headset die mid trip is a bummer when you get into a new town and want to yelp the best place for a bite to eat or when you get a flat and didn't take my advice about carrying Fix-A-Flat. Last year, I bought a Mophie Powerstation which, for $100, will recharge my phone 6 times when the battery pack is fully charged. I can go bike camping for a whole weekend and take a zillion photos (number may actually not have been tested) and still have a full battery. I love this thing so much that, when they recently went on sale, I bought the outdoor version . It's one of the first things I recommend to people to buy.