I thought of some more ...
When the lights turn green, you should go. I know this sounds obvious but some people seem to sit there for an eternity. You shouldn't be playing Angry Birds or checking your email, you should be watching for that light changing like it's the start of an F1 race.
One for us Canadians in the cold north - when the lights change and it's snow and ice, don't plant your foot on the gas and wonder why you aren't moving. You are just polishing the ice and making it harder for people to stop. You need less gas, not more.
On a related note, just because your 4-wheel drive helps you to start moving when it's icy, doesn't mean it will help you stop any faster. So leave a gap. Seriously, a much bigger gap, especially if you're behind me. I'll purposefully slow down and drive through all the slush to give your windscreen a drenching.
Here's a tip: if someone is too close then turn on your lights and fog-lights at the same time and it will look like your rear brakes. If you hit the gas at the same time you leave them behind and they don't have a clue what just happens. Usually someone pulls into the gap they left. Bwa ha haa.
I'm still seriously considering rigging up the rear washer-spray to fire ink backwards like I'm on the wacky races. Even better, a Raspberry Pi with a camera controlling a laser pointer. If people get too close - zap, instant blindness.
Also, you really don't need main beam and fog lights on when you're driving through town unless it is foggy (when main beam won't help). It makes no sense letting people put both of those on at once.
