• Five minutes easy running
• 10 sit-ups
• 10 push-ups
• 10 pull-ups
• 10 good mornings
• 10 overhead squats

Here's a good article on warm-ups.  And another (shorter) one.

• Samson stretch
• Others as necessary

• Deadlift

• Odd object lifting (tires)

1. Split into teams based on deadlift abilities.
2. Choose a tire for your deadlift abilities.
3. First team member flips the tire once then box jumps onto or into the tire, ending up on the other side.  (stand clear until the tire comes to a stop)
4. Entire team does five push-ups together...flipper initiates them "up" and "down".  (hands or feet may be on top of the tire or both on the ground)
5. Entire team does five box jumps together...flipper initiates them with "up".  (return to ground at your own speed)
6. Each team member repeats steps 3-5 until each team member has completed round one.
7. On the second (and third) rounds, the tire is flipped twice (and thrice) by each team member (jumping into/over each time) before entire team does push-ups/jumps.
8. Repeat rounds 1-3 (steps 3-7) three times.  (you will flip the tire a total of 18 times, do many push-ups and you will box jump many, many, many times)

Be prepared to get a little dirty!