ski flying

Winter doesn't mean the end of flying. It means the chance to try para-skiing. If you are a skier and a pilot, ski launched paragliding is a great way to combine both sports.
You should be a strong intermediate skier before trying to para-ski. Recovering from a blown launch requires the ability to make a sudden turn or stop.
Special Equipment
If you already ski and fly, you've got all the basic equipment you need. There is one special item that I like to use for para-skiing. That's a pair of three-section telescoping ski poles. You can find them at most shops that sell backcountry ski gear. The poles collapse to fit in your backpack during flight.
If you only have full length poles, it may be best to just leave them at home. I sewed some patches on the back of my harness that I can use to strap my full length poles on my back, pointing up like an antenna. I worry a little about my lines snagging on them though. I've also heard of people sliding the poles horizontally through the leg loops of their harness, but never tried it myself. This sounds uncomfortable and even more prone to line snags.
When flying at developed ski areas, you should use ski safety straps. This will prevent you from accidently dropping a ski on someone from above.