Registering for a Galaxy account
Be sure to note that the public Test and Main instance usage policies are one account per user, as stated in our Terms and Conditions. Also, make sure your email address is valid so that you can confirm your new account (emails are case sensitive) and so that our administrator can contact you if needed (rare, but you'll want the email!).
Watch the Accounts on Main video for a quick how-to.
Admin settig up an instance? See our User Accounts wiki for more help.