In addition to Call Forwarding Variable (*72/*73) Verizon also offers Ultra Forward which allows you to manage call forwarding remotely from any touch-tone phone by dialing an access number.
Ultra Forward costs a few dollars extra (I am in NY and pay $4.50/month) but can be useful depending on your needs.
Note: Ultra Forward has priority over Call Forwarding Variable. If you subscribe to both services any Ultra Forward settings will override your standard call forwarding. There is also no reminder or "splash" ring with Ultra Forward to remind you calls are being forwarded.
Ultra Forward can not be ordered online, you need to call Verizon to check service availability and place an order.