Quote Originally Posted by Grog
In the 3-lane case where I want to go straight and there is no right-turn lane, I will go at the top of the right lane, about in the middle (assuming there is no car in that lane). That way, incoming cars who may want to turn right will be able to do so and I will clearly indicate my intention to go straight when the light turns green.

I agree about behaving like a car to be treated like a tractor. It works!!
This is what I do too. Also, when going straight at a 2-late intersection where many cars turn right, I will make enough room to my right so they can take a right turn on red. They seem to appreciate this a great deal.