Weekends, I often just carry one mod, full enough tank and at least 75% charged battery
Work days:
Water bottle, 2 provaris with almost full tanks and freshly charged 18650 batteries, extra juice bottle(s) or extra tank with a different flavor in it, 2 extra 18490 batteries and the short cap, Japanese coton wick, screwdriver, spare coil, 1 or 2 half sheets of scott towels, 2-3 Q-tips, 1 or 2 pipe cleaners, micro-fiber glass cleaner cloth, survival knife, 2 Aspire BVC coils, automotive GPS. 2 cellphones (1 from work and my own), pack of storm matches, cellphone charger/extension, a nutribar or 2, spare underwear and 2 flashlights.
Hey, you had to ask!
... I do often have to leave the office in a hurry and go repair machinery for clients in an emergency if it helps to understand my situation, though. I sometimes do drive 3 hours to get there, so I standardized all my [possible] needs in one pod bag.