There are very few, if any, coin-operated laundromats outside the US, New Zealand, Australia, and Europe. In Europe, self serve laundromats are very scarce, and when you do find them, they tend to be expensive. Very often there is no where to do it yourself. Bring photos from home , even just a few. People you meet along the way, especially those from other cultures, may want to see your family, where you come from, what your house looks like, your car, etc.
Photos are a good cultural icebreaker and also help combat homesickness.
Don't be afraid to eat off of street carts, just be careful and aware . Don't eat food that was prepared earlier and is left sitting out. Eat food that is cooked in front of you and that has been refrigerated or kept on ice. At first we were careful not to drink anything with ice, but we found that in many countries, they are much more aware now and boil or buy purified water and ice. We drank iced coffee all over Thailand.