Link  – sign up to get free Lyft Ride credits if you don’t have an account.

Then, if you’re an existing or new user, open the app and click the payment section.Enter credit code:   PLANAHEAD17  (or go here and enter your phone number).  Limited time only and while supplies last. Valid in New York, Colorado, Illinois, Florida, Massachusetts, Pennsylvania, Missouri, Texas, Georgia; and Washington, D.C. The credits can be redeemed for rides taken between 5 p.m. and 5 a.m. local time that Thursday, Friday or Saturday night, and are valid for 2 $10 Rides. –This code is valid from November 30-December 3, it was released early. Apply it soon, it’s only for the first 10,000.

UPDATE– Here are the codes for all of the upcoming promotions. Apply them to your account before they are gone:
10/12 to 10/14 – Enter credit code:   SAFEROADS17  (or go here and enter your phone number). 

10/26 to 10/31 – Enter credit code:    LYFTSONBUD17  (or go here and enter your phone number).

11/16 to 11/18 – Enter credit code:    BUDCARES17  (or go here and enter your phone number).