I like this thread! In the summer months I'm a construction foreman and a barn/farm manager (stonemason and horse farmer), I'm also the mechanic / handyman at both places so I carry quite a bit with me everywhere I go. One bag is strictly tools so I won't bore everyone with it, this is my main bag that again, I don't go anywhere without.
BTW It's a Condor small modular "assault" pack. Also note not pictures is the good stationary pad I have in the back most pocket, half my hardscape and half my barn letterhead.
Front two small pockets:
Zebralight headlamp
Spare nimh AA's (usually I try to have 10 on me mondays, I charge them on the weekends as I go threw them and as you can see it's Thursday and I have 4 left charged)
Small container with important "left over" bolts from the days jobs
Writing utensils and phone chargers, note the red "foremans" carpenters pensils for "fix it" marks.
Tick tweezers (EXTREMELY IMPORTANT)
Middle pocket:
Canon Chdk camera and extended battery for long term timelapses of job sites
Deodorant spray
Band aids / trauma bandage / other FAK stuff (not removed from bag for pic)
Wet wipes
Main pocket:
EFI live flashscan V2 dual mfg with minimum of one spare VIN license always preloaded
Collapsible dog water bowl
Spare clean work shirt and socks
Rain ponchos for my guys (my good rain gear is always in my truck)
Sunscreen
Phone belt clip
Spare space for misc daily need items
Outside:
Climbing rated [locking] carabiner
Multiple pliers (irregardless of what other pairs may be in tool bag I always have these snap-on needle nose and these Klein linemans pliers)
Spare trailer hitch mechanism locking pin
Spray neosporen
Forceps for retrieving small parts from holes without having to dig threw either bag since they're right there
On-person carry to come (maybe tomorrow)