7AM - meet out in the motel parking lot near the interstate, exchange insults, I mean greetings, with the rest of the hung over crew and pile into the van to ride to the work area.
7:30AM - Arrive at the work area, grab shovels, screens, and the rest of your equipment, pair off, and start testing your assigned transects.
7:30- 10 AM - Dig a small hole, screen the soil, collect the artifacts (if any), write up the results, walk 30 meters, repeat, taking turns digging and screening.
10 - 10:15AM - morning break - maybe gather and play hacky sack.
10:15 - noon - same
noon - 12:30PM - lunch in the field - you brought lunch, right?
12:30 - 2PM - same
2 - 2:15 - Afternoon break - more hacky sack?
2:15 - 4PM - same
4 - 4:30 Return to van, equipment maintenance, packing, turn in forms and artifacts, pile into van, try not to touch dirty and sweaty coworkers on way back to motel.
5PM-7AM - drink, eat, maybe bathe or sleep. Fornicate if fortunate.
There can be infinite variety on the schedule depending on the project and supervisor, as to whether your drive time to and/or from the field is paid time or not, if you get to a restaurant or gas station for lunch, etc. Also on good projects, known as Phase II or III's in the East, on already known sites, you get to dig large square holes, and find and record cool stuff if you are lucky. Rookies don't get many of those jobs because you got to pay your dues, but sometimes you get lucky.
I worked mostly east of the Mississippi. I understand out West they just wander around and record GPS positions when they stub their toes on something, but you need special training for that...

I won the first DU photo contest I entered with this shot of one of my crews at work in NY a few years ago.