Use Proper Towel Drying Technique
Let your towels do the hard work when you're drying your car. Towels are made to absorb liquid -- not rub and scrub. Just lay a clean, dry towel flat and pat it straight down onto the car, then pull it away. Repeat until the car is dry; you'll probably need several towels to do this properly. This video from Fifth Gear will show you what we mean. (Skip ahead to the 3:00 mark for the towel part, or watch the whole thing for some valuable car washing tips from a professional detailer.)
Rub your towels so hard on the paint. You'll get streaks. And then you'll cry in secret, so no one knows your shame -- except people who look closely at your car.