I know the routine of a booking, have I-9 verification, a 'second change' & 'on camera' / set experience.
I saw my job as being on time, ‘on-take’ & following directions. I used what I learned in acting classes for my background work ...sometimes it was magic (& used). The successful people were 'part of a team' & I was too! I kept in mind that it 'was' work & money for cast, crew, producers, & related offices. I concerned myself with paperwork, direction & staying in status with other 'Background.' I concentrated with what was 'on take;' having quick conversation with 'other Background' about what we might do instead of 'naptime action.' I was on approximately 50 sets in 2019 before the Pandemic Lockdown; in March, 2020. My Resume(s) are projects I 'worked background' on. I was 'in the rack' on most, a blur on some... not used at all on one or two and 'featured' on a nice handful. Mostly I was on a show just 'one day' and one season ...two or three days once in a while with others... and many days/many seasons (core sometimes) on a 'nice bunch' from 'my pile' of bookings.