So "How I Met Your Mother," in it's last season, is coming up on episode 200 tonight which is quite a milestone. I've been more of just a casual viewer of the show over the years, mostly catching the slapping, but for those of you who found this 'your' must see, appointment made show well here's a pretty cool link from Buzzfeed to what it's taught you over the years about relationships and what rules should be followed as well as just some cool world views and other wisdoms from the show.