Recently, I returned to another MMO after a half-year or so absence (it's RIFT, if you must know), and I was almost frozen with apprehension over all the changes. Because the world I used to know had changed in so many ways, I didn't know how much to rely on my memories and where to go to figure out what these changes were. Fortunately, an enterprising member of the dev team created a wonderfully handy post that quickly outlined all of the changes over the past year so that returners could get caught up quickly.
I like this idea so much that I decided to do the same for Lord of the Rings Online. Ever since free-to-play hit, it's become so much easier to drift in and out of this game, and as Turbine's been ramping up the changes, it's possible to feel the same apprehension upon reentry that I did with RIFT. Freak not, fair friend, for I am here to guide the way.