People who've done this before will get where I'm going with this: drive like you're driving a truck with a heavy load. When you haul a load, you can't do jackrabbit starts, can't stop immediately, and to do that you have to pay attention to what's going on around you and plan ahead.
I agree on largely ignoring the blue light. Keep it in the green when you're at cruising speed, but keep the MPG gauge on the MID when you're doing this...so nevermind the blue/green light