Things You Do After Installing Ubuntu 12.10

If you've been following WebUpd8 for a while, you've probably noticed that we used to make a post with things to tweak after each Ubuntu release (here are the 12.04 and 11.10 posts). This time, let's do things differently!
I'll start by sharing with you the first things I did after installing the latest Ubuntu 12.10 and you, the readers, can post comments, telling us what you've installed / customized / tweaked after installing 12.10, no matter what Ubuntu flavour you're using.