As the_traveler indicated above, take a quick trip on the Acela FC, if you live on the east coast. Or take a quick trip anywhere that's in the $150 range as the dollar value is doubled as points. That's $75 each way, or only $37.50 each way if you take a friend with you! Out west, LAX-SAN would work quite well, especially if you go in business class one way.
Another alternative is to spend another $5K on your AGR credit card before 1/1 and get the 1000 TQP points that comes as a result, if you haven't already spent $20K already on the card (limit of 4 x 1000 TQP points from card). That's perhaps most of the reason they wait until early Feb for all the points to 'come in' from your CC as well as the conductors on the trains one rode on 12/31.
And, for what it's worth, a friend I travel with when he goes to NYP on business and was short a couple hundred TQPs to make Select Plus a year ago. I inquired of AGR if I could transfer some of my TQPs (I had 15K and knew I wouldn't make 20K) to his account so he'd make it to Select Plus status. Unfortunately, they declined and stated that only 'regular' points can be transferred, not TQPs.