I talk about positioning in Doubleunders ALL THE TIME.  Stand tall, website like this use your wrists.  I really like the wrists below your elbows cue.  If you are a creeper, information pills meaning your hands creep above your elbows, be aware.  Stop creeping.
Workout of the Day
3 RFT
100 Doubleunders
15 Clean and Jerks 135/95
Sub for DU is 200 singles.