What are your best tried and true life hacks for the field?

Benzoin tincture. Although it is a compound used for applying to the skin before tape or other adhesive bandages, I painted the bottom of my feet with it to toughen the skin before long road/ruck marches. Always worked, never any blisters. You will have to throw away the socks afterwards though.

Mine was a hammock and poncho liner that way i was off the ground

I would always bring a section of newspaper to the field. If/when your boots get wet, you can crumple it up and put it inside to absorb a lot of the moisture. You can also use the newspaper to help start a fire.

10lb bag of venison jerky, body bag (makes a nice waterproof sleeping bag), poncho liner, smoking jacket(field jacket liner), menthol gold bond foot powder (feels minty on the giggle berries which is nice after not showering for over 14 days and cools heat rash), baby wipes, and all the rest of the required packing list.

MSR whisper light, easy to cook food and Instant coffee.

Put your terrain model kit inside a tool box or tackle box to keep it organized. Buy some ceramic tiles with gloss finish to write your graphics on-the-go are heavy and durable, and easy to clean. Also throw an extra e-tool in the kit so you don't have to hunt for one.

Water proof bag, woobie (2), baby wipes, baby powder, 550 cord, pogey bait, and camelback. Make a tent, take a whore bath, uniform top as pillow, food and water. The baby powder is multipurpose. I am all set :)

All excellent ideas to make life just a little bit more bearable in the field. Wish I had thought of a few of them. Is there a commercial product nowadays to apply to the feet to slow down the onset of immersion foot. Always found it impossible to keep feet dry walking through flooded rice paddies all day.

The best IMO is making a lot of Ranger Pudding

Aside from the commons (baby wipes, TP, etc.) I always take a Sawyer filter 100k gallon filter. It's small light weight and you can essentially draw from a sewer and drink the water (not that I have or want to.) I fill plastic pills with magnesium powder and carry a light. But I keep a striker and flint on my boot laces. My boots are laced with 550 cord that has a line of kevlar string, waxed jute line, fishing line and the 7 strands inside of it. One of the laces is topped with a hidden hand cuff key. I also keep a similar bracelet with a hidden cuff key in the buckle and a flex cuff cutter hidden under ranger bands. On my dog tags I kept a survival tag that had an arrow/spear head and fishing hooks. I always had a survival card hidden in my plate carrier. It has all the essentials I need in case I'm in a real "oh shit" situation. Pancho liner of course is a must and a wrist rocket sling shot. Small game will keep you alive. In combat and camping I've carried the Gerber LMF II knife. It has so many uses and it's great at digging a Dakota hole (if you don't know look it up it's a life saver/changer) compressed towel and wash cloth tablets, rinse free shampoo is great for not smelling like a 5 day old ballbag with extra fromunda cheese. I also have a patch that has a hidden pouch under it. I keep 4 small metal tubes and 6 rounds of 22LR with 5 penny nails (toe poppers) for security if I find myself separated and being pursued. Just remember where u put them you don't wanna pop your own toes. Finally, I carry a solar power bank. So I can charge the batteries for my equipment. CR123A comes in a rechargeable version and all you need is a USB micro to keep it going. Of course extra CR123A batteries for change outs.