Rarely do we test everything - usually fire up a panel outlet and a bathroom GFI (keep some old ones on the truck and reuse them) so the other trades have power - sometimes pigtail sockets... Once in a while an outside GFI for siding and roofing guys.
Biggest paranoia is missing a feed - always strip a short bit of insulation on all feeds and check to make sure they are all there. Painters made me give up marking feeds with romex sleeves.
Digital camera sometimes - lable home runs with romex sleeves.
