MyAnimeList - and I wish I was getting paid to say this - is a great place for keeping track of your anime watching. I used to keep track of what episodes I’ve watched on a sheet of binder paper (it got quite crowded), and kept tabs of my favorites on one of the pages of my blog.
Now, I can just spam you with a link to my AnimeList profile and make you do all the dirty work. Yay, social networking!
Additionally, I’ve started what I hope will be an extremely brief mini-blog over there, in the veins of many other users, to make quick seat-of-the-pants - yes, I wear pants while using the computer - commentary on episodes I’ve just watched. I dub it Mini Megane Moe. Sickeningly predictable and cute, isn’t it? You can check it out in the RSS feed in the right column.