Here is the best technique I know of and is what I use on mine and my friends cars.
After washing the car you need to do a pooling rinse if possible. This is when you take the sprayer off the hose and let water gently pool all over your car, starting from the top down. If you wax your car, like you should, you'll be able to dry a majority of the car just using water.
Now the towel, it HAS TO be a quality microfiber towel. NOT from the local store, they won't cut it. Try autoality.com, good prices on towels. Do not ever use a chamois, microfiber works with millions of little loops of fibers that gently lift away dirt from the surface, a chamois will pick the dirt up and drag it on your paint, that causes swirls.
Drying your car has the biggest probability of you swirling the paint, its the most dangerous part of the wash. Take your nice new clean microfiber and soak it in water, then wring it out completely. Then take a quick detail spray, I could give you some recommendations if you want, but spray it all over the towel, then starting from the top of the car wipe in one direction wringing it out after each section, continue to spray QD. Lubrication is key in the drying process. Believe it or not a damp microfiber picks up water like a magnet.
After you do that initial dry you have to take a dry clean microfiber and gently buff the car to get rid of residue from the qd or spray wax. Remember to get your trunk jambs and door jambs!
Sorry long post.
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