Your best bet is placing a standing order for the 125-pack of T-credits. You get a big chunk of VP (1,661 VP, to be exact) added to your score. Plus, for every credit you use for auctions, Eager Zebra games, and listings, you earn more VP! So it's really a win-win situation!
Of course, lots of people will say exactly what I'm saying, as this is a common question.