Keep your hands at 9 and 3 (not 10 and 2)
I'm not saying driver's ed was total crap, but far too many drivers were taught to keep their hands at 10 and 2. If you're among those following this utterly false, unsafe driving myth, adjust to 9 and 3 and you'll notice a world of difference -- it feels more natural, because the steering wheel was actually designed for it. And unless you're taking a hard right turn or pulling into a parking spot, you shouldn't move your hands around on the wheel too much.
Pretend you're driving a limo
Always be smooth, and try not to make any sudden, jarring movements in braking, turning, or acceleration. You'll be safer, because it takes concentration and planning to drive smoothly. You have to brake earlier, ease off the pedal somewhat before you actually get to your turn, and be vigilant for potholes, bumps in intersections, and other potential dangers to steer clear of or move through more slowly.