The important stuff first, of course, so... The drum rug. Then (if it's not provided...) the mains cables and speaker runs for backline, lights and PA along back of stage. Our Youngest (the bassist...) and the singster take the drums out of their cases whilst I prepare the pedals and stands; the kit is quickly put in place (the stands and booms are preset...), so the cases are stashed, then the cabs rolled in and amps perched. I'll install cymbals, singer lays out mic stands and cables, PA stands and foldback installed (if not already there...), guitars and bass prepare their quarters with stands, pedal boards, leads and stuff and we're ready for a sound check. Typically drums, then bass, then drum'n'bass, guitar 2 then 1, mics, a short 'all together now, please' and relax.
Tear-down is roughly the reverse order, not forgetting the drum rug at the end. Once all is safely back in the truck, a mandatory look-around to spot whatever has been left behind (my drumming shoes, the E-Bow, a set list or two...). There's always something...