How I finally got my truck bed packed right - the method that worked

I run a layered setup in my Ram 1500 but the thing that finally stopped all the sliding was a rubber bed mat. Everything grips now, so half my bungees went back in the drawer. The mat plus a few milk crates from the farm store is most of my system, honestly. Crates lift out whole when I need the bed empty for a weekend, which used to be the worst part of a packed bed, unloading everything one armful at a time just to get one thing out from behind the cab. I like the photo idea. I tried drawing little diagrams on a notepad for my usual Friday loadout and gave up after two weeks. Phone pics are way easier. My typical build is a crate of cordless tools right against the cab where I can reach it standing on the ground, sawhorses flat on the mat, then sheet goods on top if I'm hauling them. Nothing rolls because nothing has room to. The other change that paid off: no loose fasteners anymore. Every bin of screws and nails gets a lidded tub, and the tubs are all the same size so they stack clean. Before that I'd burn ten minutes every Monday sorting hardware that migrated across the whole bed over the weekend. My neighbor across the street hauls with milk crates too but his are all diffrent sizes and he's always restacking at the job site. Mine all nest, so one trip to the truck and I'm done.

The same-size stacking tubs thing is huge, that's what finally made my bed workable too. I bought three identical totes and one lives on each shelf of my trailer so I never even think about where the fasteners are, just grab the tub. Also copied your photo trick but took it one further - I labeled each photo with the job type so Monday mornings I pull up 'deck build' and the whole layout is right there. Saved me from my old system of digging around wondering if the jigsaw is under the drop cloths again.

I tried the layer thing last weekend with my dad's old truck and it sort of worked except for the tall stuff. Shovels and a push broom just don't lay flat no matter what I do, so I shoved them in the corner and one fell out when I opened the gate. Do you wedge long thin things in a corner or tie them to something?

For the tall stuff question, handle-down in the corner behind the wheel well and then a single bungee stretched corner to corner across the bed about a foot above the floor. That low bungee line catches shovels, brooms, even a sledge without you noticing it's there. I do 3 or 4 kitchen tearouts a year and that setup has never let a tool walk on me, even on gravel back roads. Last thing you want is a shovel handle punching you in the back of the head under braking.

Update: tried the low bungee line trick from the kitchen tearout guy last Friday and it's a keeper. Stretched one corner to corner about shin height and my shovels and the long level stayed put the whole day. Also picking up a bed mat this week since aparently half my straps can go. Next test is wheather the mat makes the saw horse base slide instead.