First of all, good for you, and stop criticizing yourself. You're doing many good things at once. If cyclists are rare in your area, you're making it safer for cyclists because to a small degree, you're getting motorists getting used to seeing cyclists. And that's the least you're doing.

I have also found that the more assertively I ride, the more respect I get from motorists. Note that I am in NEW JERSEY, which is famous for bad driving, and it is a well-earned reputation. I take the lane often. Another technique I have stumbled upon is to turn my head back, even when I know where the car behind me is. Sometimes, I do a double take. This signals to the driver that I know he is there and the way I am driving my bike is deliberate and conscious. I take the lane when it's not safe for a vehicle to pass me in the lane. But I try not to obstruct traffic, too, so I move over to let them pass when possible.

Sometimes I signal with my double-take turnaround by looking backwards and turning left. It's a very clear signal.

Lots of lights and reflective gear says, "Hey, I'm here, please help to take care of me, and I'll be courteous to you."

My short motto is "Predict others, and be predictable." People will cut you off. Try not to let any of this get to you. If you get annoyed, you lose. The biggest threats are right hooks and left hooks. The right hook is where you are going straight and someone comes from behind on your left and turns right in front of you. Be prepared to swerve right or brake hard or both. But as soon as you see them begin this move, ring your bell and yell. He just might stop or slow.

The left hook is where an oncoming driver turns left in front of you while you're going straight. In this case, whenever someone is coming in your opposite direction, be prepared to swerve to the right or brake hard or both. Again, ring your bell and yell if they start this move.

Those are the two biggest ways to get in a car/bike collision where the motorist is at fault.

When someone gets angry at you, don't get angry back, at least not outwardly. You could mutter some choice words under your breath if you need to. Ask yourself if you have any part in the matter. You might. Best not to express anger with your face or gestures or words. Maybe a wave, because that can be construed as "sorry" or "hey, great to see you," or at least "Hi, I see you."

Do not worry about your pace. Just enjoy the riding. Your pace will take care of itself. If you get winded or sore, slow down or stop, and catch your breath. Then resume. That's what I do, and it works for everyone at every level of fitness.