This is what pissed me off everyday while I was on my way to school 2 years ago. When you get to a traffic light that one of the lanes is left/straight and the other is right/straight. There is one person going straight in the left/straight lane and the guy infront of you goes in the right/straight and he is going to go straight. You on the other hand have had your right blinker on for 1/2 a mile and he still goes in that lane and blocks you.
Then what really ticks me off is when the guy in the left/straight lane beats him out
Another thing is when you are going around 42 in a 35 and there is someone right on your tail, like 1 car lenght away. I deal with that however and start going 30. Maybe at the next light, burn some rubber, beat him out and keep going slow.