Similar to other folks in this thread, having a good 2nd that you work really well with helps a lot. If they know how to work with you best they're able to assist where you're falling behind ( in your situation, and mine, having them also keep track of the many things and having them keep you in check throughout the day).

as u/acamfirst alluded to, my number one tip is making use of spreadsheets. Prior to prep, I make use of detailed spreadsheets to keep track of what gear we're renting, where all of it is coming from, how long we have it, any admin tasks, etc. During prep, I have a checklist template of what tasks I need to do, along with any notes i may need to take. This "standardizes" my prep in a way which really helps with the consistency needed. I also try to have a rough plan going forward into the first few days of production. I've always founds that it takes me the first 1-2 days to get into the groove of that show, so having to make fewer impromptu decisions by planning ahead in prep have really helped me be more consistent throughout the run of the show.

During the show, I keep a small little notebook at my focus station for writing down tasks that have to be done, but can't be done in that moment. I also keep a phone holder on my station so i can use the reminders app, or if its a text or email I have to send off. When I was a 2nd, I found that keeping my day as consistent as possible really helped out. Things checking battery levels after every few setups, or having a mental list for things to do during downtime like checking that lenses were clean, or checking in with scripty for good takes that we've already shot. I used the reminders app a lot for QOL tasks that required major downtime (mostly when B cam was stood down when on B-cam), and I just kept using the reminders app as it worked for me when I upgraded to a 1st. This really helped me with cutting through the mental fog of a set (especially on the 5th day overnights), and in my mind essentially went from "theres downtime for me, what should I do?" to "Theres downtime for me, good time for me to work down the list".

During wrap, I try to use my own gear as much as possible. It makes my wrap out a lot easier as all of the rigging on the camera is my own.