I'll just add one (perhaps surprising to some) suggestion.
I have a very detailed pre-travel checklist that's currently about 8 pages long. It includes not just things to bring but tasks to complete before departure (everything from booking and double-checking all reservations, to stopping the postal mail, to locking the doors on exit, etc. etc.). OK, so I'm obsessed with details. It helps make travel less stressful for me.
My "Stuff to Bring" packing list section is about 5 pages. It's quite detailed so not appropriate here (and you don't really need to know how much underwear I bring). But one item I always suggest anyone bring on a foreign adventure is a small, cheap compass. Tiny and feather-weight, a compass can help you find your way in a strange city. It never needs batteries and works anywhere. Get one at REI or some other "outdoor" store. Not an expensive one, just something that can point out (more or less) which way is north. The cheap ones often are combined with a thermometer and come on a clip. Costs less than a fancy cup of coffee. The smaller the better.
I have found a compass extremely useful in the narrow, twisty, maze-like passages you find in the old sections of cities in Morocco, and elsewhere. I've used one successfully to navigate vast underground passageways in Tokyo (there's a whole second city underground there) and through sprawling urban markets in Bangkok and Mexico City. With a compass, you can laugh at the people who warn you "Don't go into the medina, you will get lost if you don't have a guide!" Helpful anywhere when you need to get your bearings (literally).
OK, now back to my checklist. Hey, where did my spork go?