2 lanes merging into one: What do you do?

i usually try to be in the lane that is going to remain and not end…maintain my speed and let the other person decide what they are going to do and be observant…in construction areas…i try to get over when i see the first or second sign saying the lane will end…i try not to be that guy too much that flies up the ending lane…although i do it a lot at the 90E/W split off the 290 by the water tower…however if i am in backed up traffic that "that guy is trying to get over at the last minute. I will ride the ass of the car in front to block or drift over the white line to prevent people from flying up the shoulder