You need to confirm your user account email address to reset the password for your account. After confirming your user account email, you will receive an email that prompts you to create a new password for your account within 1 hour.
Users are locked out of their account for 60 minutes after 10 unsuccessful login attempts. If you find you are unable to log in and/or get logged out, email us at moderation@ifixit.com.
As Sven noted, this doesn't work anymore because they've removed the Reset My Password option, and there aren't any controls within the user profile once you get in with the one-time code they send. So... that sucks.