ALex's #1 wors for me everytime.
Obviously you need to understand what is downwind of your kite to prevent yourself from being dragged into something if hit by a large squall.... but I have been using this method to launch nad land for over 2.5 years now.
The Sigma profile really helps with this method as the straight lines allow the kite to stay put better the an older constant curve design. I make sure that the kite is depowered enough on the bar and use the stopper to keep the bar in easy reach. If you do not, you sometime find you need to stretch a little too much.
When I go to a spot on my own I actually reverse my van in and use the trailer hitch as the anchor point, the chicken loop fits right over the bulbous end and works a treat!
Works on the 2006/07 Shockwave Boxer SLE, Helix 07/08 and Cult 07/08
If you do not have something, fill your kite bag with sand or rocks and tie the ckn loop to the bag.