Glad to have run across this as I'm going to look at a 2006 Jeep Liberty tomorrow for the wife. Since I see your close to me were actually going to the Subaru dealership in Waldorf. I'm in the military and were using the recommendation off the USAA website, but there were some good tips in there.
I actually used to sell cars as well. I only did it for a month cause as you said the hours were crazy (50+ hours a week as you said) and it was too much BS. I had numerous people come back to buy a car after they're first visit because of how I treated them and how nice I was. I also wasn't very pushy. After I left I gave all my leads to the only guy there who was also a decent person and he made a good bit cause of me lol. Also the ones that came in guns blazing and were huge ******** made me want to screw em over and I didn't care if they bought a car or not. I tried my best to show em I'm not trying to screw em over, but you can't please everyone.