Follow the steps as outlined above. Add or remove leagues to the list of leagues you are interested in and choose whether or not to receive emails about those leagues.
Click in the leagues field to see the drop-down list of leagues that you might be interested in receiving updates about (updates include reminders of rounds starting). You can also remove leagues from your selection by licking "x" next to the league title.
Selected leagues will appear on the home page of your account profile and email reminders will be sent automatically.