As soon as you create your account, you will receive an e-mail with your password to access the system. You can change it anytime by clicking on your name at the top right of the screen, then click "My settings". Choose a new password and click "Save" at the bottom of the page.
In this e-mail you will also find a link to validate your account. Just click it and you will be redirected to your Runrun.it home page.
Now your account is validated!
If your account is not validated within 30 days, it will be deleted from the system.
Now you will find how to complete your registration!