A lot of it is going to depend on what it is you like from a food standpoint. If you want to take something that needs to be chilled don't forget the frozen peas trick. You can pack your perishables in with frozen peas and then throw the peas away when you don't need them anymore.


Sliced fruit, strawberries and grapes or whatever other fruits you like
Veggies w/a dip*
Sliced tomatoes
Boiled eggs
Cheeses (nothing smelly)
Sliced meats
Crackers
Vacuum packed or canned tuna or chicken
Sandwiches-with no condiments* or tomatoes
Packets of soup and oatmeal (FA should be able to supply hot water)
Reese's Cups-minis
Mini candy bars
Granola/Cereal bars
Chips
Nuts and trail mix
Wasabi peas
*Condiments & dips - don't put these on your sandwich or it will be soggy and if they are too soupy or liquidy they are going to have to go in your 3-1-1 bag as a liquid in limited quantities
Takeout cutlery
Wet wipes and napkins

Again this is going to be dictated by what your food preferences are. I think the details are in the preparations in advance of your flight.

There are some choices when it comes to the airline food on international flights, look through their special meals and see if anything looks better than what you usually get. I have always request the diabetic meal about 8-10 days before I go on an international flight and find that it is better than the normal meals from a taste and nutrition standpoint.