Well, now, this is one of the few threads I've read from the beginning. I've done a few of the things already mentioned but only a few. One thing mentioned that I do always is to carry a cut foam pad to sit on, if I don't have a full length pad with me, which I would only take on an overnight. The Girl Scouts call it a "sit-upon."
I've rarely built fires, so I can't contribute to the ancient practice of fire-making. Instead, I will at least have an Esbit cooker if I'm just heating a mug of water, otherwise a full-grown gas stove. I have a Leatherman (also fully grown) multi-tasker but it's way too heavy to bring along and most of the tools are useless for what I have with me. But to refuel an old-fashioned Svea stove, I bring a small slip-joint plier to open the fuel cap on the stove. That's about the only thing I can conceivably require a tool for. Nothing I take to the woods have screws, corks, bottle caps or cans that need an opener.
I use a thin insulated lunch bag, which I received when I attended a company function about 20 years ago. It is perfect for carrying (inside the pack) all the little things, mostly cooking related. Then one day I happened to notice that if I cut down the plastic container that kitty litter comes in, the lunch bag fit perfectly inside. The plastic container makes a good basin for washing things, as you don't want to use cookware for washing your face or your socks and, anyway, all of mine are too small in the first place. As another mention, however, have some cold water in there first when you pour in the hot water. The only negative is that it's stark white.
I've mentioned this elsewhere but "para cord" is everyone answer the anything that a cup of tea won't fix. But I have found that I prefer something better, preferably white. White cord will not stain anything if it gets wet and it's easier to see at night (which means it isn't tactical). But so-called para cord is cheap and is still useful. I experimented with some very fine nylon cord once. It was strong and would support, oh, probably well over 40 pounds but it tangled up like crazy. Some things work fine on the floor at home but not so much in the woods among the twigs and leaves and dirt.
A real luxury in the woods is a flat and level surface. I have no solution for that problem, I'm afraid. But another basic problem in the woods is simple cleanliness. One thing that helps a little is to use a pair of cheap cotton work gloves, either drill or jersey. They help keep your hands clean around the fire and the stove and function a little as pot holders as well as handling sticky plants. But my father used to say that wearing gloves too much makes your hands soft.
I expect you all carry toilet paper like I do but I also carry some paper towels for cleaning up the cups and bowls and spoons. "Usually" a rinse with water and a careful wipe down with a paper towel is good enough if your food isn't greasy. But if it is, use my unpatented cut-down plastic basin mentioned above. Detergent is still problematic and my trials and experiments are so far inconclusive. Part of me wants to use GI (army issue) soap but I've never found any for sale, which may not be such a bad thing.