Click on the Request new password link in the left sidebar under the User login boxes. You will be prompted to enter your username or e-mail address. You will need to answer the CAPTCHA word verification (to keep robots at bay). You will be sent a one-time link that lets you login and change your password.
If you remember the e-mail address you provided during registration, you can follow the instructions above to request a new password. If that does not work, contact the website administrator using the Contact Us link in the footer.