I'm thinking about writing a short/moderate length survival guide for Left 4 Dead 2. Haven't been playing much of anything lately, but after like 60 hours into the game, I've become extremely competent at it. When I do play, I'm still a lethally proficent team member.
Unlike some people, I also have a rather strong aversion to leaving fallen teammates behind, except for bots, hehe. That means I can drop more than my fair share of zombies in a hurry!