Facebook and Twitter are good for a lot of things (keeping in touch with people, talking about current events and TV shows) but neither one's very good as an archive. Thankfully between LiveJournal and Flickr, I can usually find a specific post I'm hunting for, and LJ is really great for looking back when I just feel like browsing.
I also really love tumblr, but hesitate to make it very personal. I like it as a visual repository, but also fear the power reblogs wield in terms of things gaining too much of an audience.
It's been nice to meet some new people here this year. Makes it feel a lot less dead. As always, I hope more people will come back. It was funny to see tons of people talk about how they hoped Ello could be like their old LiveJournal days, when the option to post here was available the whole time.