There are many things people do on the road or in parking lots every day that piss me off. I've listed some of them here in no particular order. If you find you are guilty of any of these, please stop!
Know those little lights on or under your bumper? They used to be called road lights or highway lights. Some people call them fog lights. You use them on the highway. Not for looking cool when you drive around town. Turn them off. You're blinding the shit out of other drivers. Toyota Supras have the worst. Well, Jeeps are bad too. Then there was the idiot redneck I saw with all those lights on his roll bar actually turned on while going down the interstate. I thought those were only used while full of beer and chasing scared deer through the woods. I've seen more and more trucks with six lights mounted on the front. This is supposed to be illegal, but I've seen cops pass right by people with these. They don't seem to care about anything except speeders.
If there's a merge lane, use it. Don't stop.
If you need to merge into traffic, match speed with the other vehicles. Don't expect me to let you in if I have to slow down 20 MPH.
Always use your turn signal when changing lanes. I can't believe how many people are too lazy for this simple courtesy.
If you suddenly realize you've missed your exit on the interstate, don't come to a complete stop and expect four lanes of traffic to let you move over. It won't kill you to go to the next exit and turn around. It might kill you if you don't.
If you're too stupid to use a cell phone while you drive, don't. You pick which you don't want to do.
When it's raining, don't tailgate the way you do when it's dry. You're too close even when it's dry. It's even worse if the road is wet. I don't care if you have anti-lock brakes. They won't make you stop any faster.
Back to turn signals -- when turning off the road, don't wait until you come to a complete stop before turning them on.
Get out of the left lane! If you drive a minivan, this almost certainly applies to you!
If you cannot competently drive and park a five ton SUV, don't buy one.
I don't care if it is a new car... don't take up two parking spaces in a crowded parking lot. I'll just go home and get my old pickup truck and wedge it in beside you. On the driver's side!
If you're driving your grandma's car with a handicap tag, that doesn't mean you're entitled to park in the handicapped spot.
In a parking lot, don't sit there five minutes waiting for someone to load their car so you can get the choice spot. Take one fifty feet away and walk a little!
When you're sitting at a railroad crossing at night waiting for a train to pass, turn your lights off so as not to blind the folks on the other side of the tracks. Usually your car will be pointed up slightly at the track crossing so your lights are shining right on everyone else, even on low beam. If you drive a newer car that has automatic lights, there is usually a way to turn them off. Try setting the parking brake, for example.
Count your money and put your ATM card away after moving from in front of the ATM machine.
Quit throwing your burning cigarettes out the window onto me. Use the damn ash tray!
Know those lines on the pavement at intersections? You're supposed to stop your car behind them. Not on them. Not in front of them. Don't make people using the crosswalk have to jump over your hood. I've seen idiots pull way up into the intersection so that their cars are completely off the red light sensors. Then they sit there and wonder why the light doesn't change.
Don't cut the corner when turning left. Even if you miss the car that's coming, you'll probably trigger the left turn light sensor and make everyone wait for nothing.