Buy In: Get your bars set up and complete a few progressively heavier short sets of each movement. Plan to work together during this workout with someone who is about your size.
copied and pasted from CrossFit.com:
10-9-8-7-6-5-4-3-2-1 reps of the triplet:
Deadlift: 1 1/2 body weight
Bench press: body weight
Clean: 3/4 body weight (yes, SQUAT clean)
Set up three bars and storm through for time.