Woohoo! You rock!

I had a couple of crashes in the first few weeks (well, one was just a tump-over) because I wasn't experienced enough stopping. The riding was easy! Turning corners, etc., piece of cake. Stopping wasn't even hard, since I slowed a lot until I could stop easily.

So I didn't recognize that I wasn't strong enough at "stopping" until I had a couple of situations where I had to react quickly. Once, I was barely rolling forward, but the realization that I really needed to stop threw me -- and I tried to use my coaster brakes! (Of course, there ARE no coaster brakes!)

The next time I was going faster when I realized I wasn't going to make the turn without hitting a curb, and panicked and didn't stop well.

So my advice is this -- find a school parking lot or some other smooth, flat, traffic-free area and simply practice stopping and starting. Do some figure 8s in both directions and circles in both directions, too. Just take it easy and experiment. First comes learning how to do it. Next, comes making it instinctive. I have to admit it's not purely instinctive for me yet, and I've ridden a couple of hundred miles. But it WILL be!