Small charges and then pay the bill works good for these cards to let them grow.  If you're going to buy something anyway, use the card, then go online and pay it!  

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Starting Score: 504

Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge