Night vision googles, binoculars, laptop with removable hard drive, lock pick set, c4, air card, air burst grenades (2), signal jammers(2), black mamba(1), Epi-shot, poison tablets and a hand ax, small digital camera.
@queenzboulevard: Been reading those Tom Clancy books too? Try Lee Childs, Jack Reacher series. That are really good. You can start anywhere and only be slightly out of sync.
In my backpack I would have a Glock 19 with a high mag clip and night goggles.
A cyalume stick or two, a Swiss Army knife (if it’s not in my pocket), some elven rope if such can be had, and certainly a laminated card certifying that I am not a spy. Oh, and a needle and thread and some Kleenex pocket tissues. You never know.