Make sure you can meet the minimum spend on all the cards you apply for. It is also a good idea to spread out the applications based on who does an inquiry from each credit bureau. For example, in Washington state, American Express pulls Experian, Citibank pulls Equifax, Chase pulls both Experian and Equifax, and Barclay pulls Transunion. Check your credit reports to find this out, as it is different depending on where you live. Credit Boards can also be a useful source for this information.

Also, I have found that Chase will approve roughly one card every month or two, two cards total in a calendar year, and to be approved for more than that, you must call the reconsideration line. Chase may give you a hard time if they notice you applying for lots cards with bonuses and cancelling them when the annual fee is due.