Hello fellow SunCycler!
To renew your BCNM membership you must begin by logging into the site. The login is the one created when you became a member. You can login to the left of this page or to the right of the BCNM main page. If you forgot your username or password, no big deal. Below the login fields you can request the information you've lost or forgotten.
If you do not have a login--you paid with check prior, or just haven't used the site before--make one, become a New Member and contact firstname.lastname@example.org. Make us aware that you're updating your past membership with this online contrubition.
Once logged in, go to the Membership menu option. Then go to 'Become a Member.' The membership form will recognize that you're a renewing member.