I love my little black backpack. It is nice and small and light, making it both great as a carry on and a day bag. Initially it didn't fit everything I wanted but in order to travel long term you have to make some devastating cuts. I have it boiled down to the necessities that now fit perfectly. When I am not traveling it is great for just a camera, kindle (loaded with destination and language guides), cell phone, and wallet. With extra room during the day I can pack healthy fruit and snacks too.
This is everything I take with me when I am in transit. Keeping it light and to the point!
J Crew flip wallet
Small hair clip
Organic silk sleeping eye mask
Natural mint lip balm with hemp seed oil
Pouch with headphones and headphone splitter
Small Kate Spade make up bag
Journal for writing
Kindle in leather case
Passport in holder
iPhone 6 (great for photos)
Compact magnified and lighted mirror - bulky but worth it