Take control and think "can".

Give yourself fifteen minute buffers on either side of a drive so that you are never rushed or late.

Study good driving behavior. Our bus driver is a great driver - he could drive nascar. He is very confident and always relaxed. He does not drive fast but gives plenty of room for other cars and thus moves seamlessly through traffic.

I watch him drive and model my own driving after his.

And realize that dings happen. It doesn't make you a dingbat.