I think you might benefit by adding post session / post day or weekend rituals.
For sessions that don’t end in tragedy I have a normal routine.
(Excluding your debrief)
I eat and drink after a session - gives a chance to digest and stay hydrated.
I take care of my chain after every session. #1 it is probably the most prone to failure system on the kart. #2 That way the lube has a chance to dry and not fling all over the kart as bad. If I need a gearing change I do that first. The dirty gears come off the trailer & go into the parts washer when we get back to the garage.
I have a systematic approach to check the steering system or rear or any system on a kart. On the steering I check for looseness, missing safety clips, bent tie rods etc. I am also always touching everything. So it is visual and tactile. I suggest going from steering shaft to wheel (or wheel to shaft) on one side then do it on the other side or check items symmetrically both Inner tie rod, bolt & rod end, then outer, then kinpins, spindles, etc. If I can’t check a system between a heat it doesn’t bother me because I am checking so often and systematically it is overkill. I find it helps me decide how to prioritize work back at the garage.
On an LO206 I drain the fuel from the carb after each day. That way I don’t forget and get the green bowl. Inevitably you will get non-ethanol fuel with ethanol and forget to drain a bowl. If I do one thing after the day is done that is it on a 206, nothing else will get that funky and can wait . . . unless it rained . . .
A lot of it is just priorities that need to be put in order. For me the key is to keep it modular. Front end check, rear end check, chain, engine or checks are just like running down a mini checklist. I do the # of steps in the same order on a LO206 intake check every time I do it. Maintenance is handled the same. I even developed a habit of packing modularly whenever possible.
Food is a low priority for me. Not that I don’t need it, but in the sense that I can just eat at the track or near if I can’t prep it ahead of time. Water, bananas and fig newtons will get me through the day.
For a while I had the luxury of having everything done and loaded on Thursday night Fri night was just relax. Sat morn was meet for breakfast, then got to garage open gate, entrance door and garage roll up door. Get food from fridge and transponder from charger, crank up and roll out closing up behind. That is such a great way to start a day. I usually have about an hour of dead time before I can hit the track.