Now that the Xbox One has been released it feels like a good time to start a new topic for everyone to post their GTs, arrange parties, swap Twitch IDs and follow people on Xbox Live.
I have kept the TrueAchievement leaderboard posted by PabUK when the Xbox 360 launched in the topic, so please continue to sign up and add yourself to it.
There are two leaderboards you can join that rank your Gamerscore against other Neowin.net members. Add your Gamertag to one, the other, or better yet both of them! Details follow.
This is a newer leaderboard, created in February 2010. It ranks Gamertags based on what it calls a TrueAchievement score. This is similar to Gamerscore, except all achievement points are weighted according to how rare the achievement is (i.e. how difficult it is to obtain). It's a great concept, and you might find your position quite different from what it is on the other leaderboard. This one is open to anyone, so simply join the website and then add yourself to the leaderboard.
Visit the Neowin.net leaderboard at TrueAchievements.com
If there's a particular game you want to play then mention it and the times you are available to play. It'll help others in the same time zones party up with you.