To update basic information - such as your name and personal information:
Click on your name in the upper right corner, then select "My Profile" from the dropdown.
Click Edit button to the right of your picture.
Make changes in the resulting fields.
Click the Save button when you are finished.
Click on the photo image to Update Photo and make it publicly accessible
Upload Image
Click the checkbox to Show my photo on publicly accessible pages
Click Save
To update username, password, location & company name:
Click on your name in the upper right corner, then select "My Settings" from the dropdown
Select the Account Settings tab at the top of the page
Click Change next to the corresponding fields
Hit the Save button when you are finished
To update professional email and visibility options:
Click on your name in the upper right corner, then select "My Settings" from the dropdown
Select the Preferences tab
Update the information directly on this page
To update email options:
Click on your name in the upper right corner, then select "My Settings" from the dropdown
Select Email Settings
Turn on or off the preferences directly on the page