The only reset that occurs on January 1 is any progess made towards A-list status and companion pass. Otherwise, it's pretty easy to keep your accrued points from expiring. From Southwest.com: "Points will remain active and valid as long as you have at least one qualifying earning activity every 24 months. Qualifying earning activity includes 1) completed travel on flights booked through Southwest Airlines®; 2) points earned by transacting with any current Southwest Airlines Rapid Rewards Partner 3) points earned through everyday purchases using Southwest Airlines Rapid Rewards Credit Cards and through points transferred from Diners Club®, and 4) points purchased for personal account use."
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