I primarily hunt flooded timber/ swamps, so not much more than what I can carry. Most of the places are to tight for a boat.
Blind Bag- shells, extra gloves, water bottle, thermos, small peice of rope, small folding saw, flashlight, extra batteries
Decoy bag- 2 dozen mallards and 1 dozen woodies, 2 feeding mallards
Small waterproof bag(inside blind bag)- CELL PHONE, camera, GPS
Over the years I have tried to slim down what I carry to the essentials. If I am lucky enough to be hunting out of my jon boat it is basically the same, just add to large camo tarp to cover the boat, tree saw (to cut a couple limbs to cover the boat), small cooler, and a towel and dry change of clothes. I am probably forgetting a few things