To access User Settings, click "Settings" in the left hand navigation and "User Settings" will be the first dropdown.
Once you get into User Settings, you can update your name, email, job title and time zone.
To update your avatar, click the Browse Avatar button found above the photo on the right. You can then choose any photo saved on your computer.
You can also access and update your Email Settings from your User Settings page. Click here for information on Email Settings.