What are your credit scores? For shopping cart trick (SCT) success, being in the 600s with a couple or more open (secured or unsecured) cards will be helpful. Search SCT on forums here to see current list of store cards that can be obtained that way, and to read other's experiences in their quest to get such cards.
While many here will strongly disagree, sub-prime, unsecured Credit One is an option to consider, if you are anxious to get another card right away with minimal upfront investment. While it's lousy compared to Capital One and others, it's far better than the likes of First Premier ($95 to just apply, 36% interest, and requires checking account)...
Credit One deducts $75 annual fee off the top, so one starts with at least $225 available credit. Interest rate is high, but still in the ballpark of many better cards at around 24%. It will help build score - it has for me, and the interest fees have been reasonable for what it is. Key is to pay the first bill in full. Use express pay (~$10 fee) to pay same / next day -or- mail in money order / on-line bank bill pay at least 2+ weeks ahead to ensure timely payment. Credit One begins reporting the second month.
With all that said, a secured card is more economical with less fee surprises. You can have more than one Cap One, but if you want to spread it out a bit, consider OpenSky - it reports as a regular credit card, and is simple to get. That's a better route than getting more store cards.
