From the login page, if you have forgotten your password you can reset it by selecting the I forgot link next to the password field.
Enter your Account ID and Email or Username to submit a reset password request.
Clicking submit will have the system send an automated password reset email to your email address. Follow the click here link in the email to create a new password. Note that the link in the email is good for 24 hours. If you wait until after the 24 hour period the link will no longer work and you will need to restart the process.
Once you have entered your new password, you will be able to log in using the new password from now on.