A key skill in speed skiing is how to stop, which has two steps:
1. Stand up.
2. Throw skis sideways in a hockey stop, inclining to resist the force.
You can't do it from your tuck, and it's worth practicing, and it's especially worth practicing while tired, since that's how you'll be at the end of a race.
(My wife has seen me ski race only once, and that day I crashed after crossing the finish line on BOTH runs, sliding under the fence at the end ignominously the second time. Kind of a race after the race, except this time with random items of my own equipment, not the other competitors.)
Biff Kneesprocket's other example of how NOT to do it (actual resemblance to real racer cruelly unfortunate): While doing timed runs against brother, miss the last gate because, due to a mental error, you stop skiing one gate early and go for the wand in a tuck, then realize your mistake, and while whizzing along, turn uphill toward missed gate and bang side of helmet with hand in universal gesture for "I am SUCH a moron!" only to then turn and instantly become a meta-moron (a moron of a moron as it were) as you're about to go through the side AND end fence of the stop area. Then the incline against the hockey stop practice suddenly comes in handy, because you can just skip the hockey stop entirely and launch a flying karate kick with both feet (to save the rest of the body), going through the bamboo poles the side fabric is strung on feet first to avoid injury. SNAP! SNAP! SNAP!
Five stitches for the puncture wound in my shin. On the plus side, (1) I now have medical charts in every clinic in Park City, (2) when my son later got a nasty cut on his calf by falling into a heater grate I could give him a completely accurate description of what they'd do in the ER when we got there, and (3) I now know how startlingly white the shin bone looks, which should motivate me to brush my much less bright teeth more frequently.
If you want to ski in the worst way, ski the Biff Kneesprocket(tm) way. Otherwise, Biff's done the lab work so you don't have to....