I'd agree with the bit about not cancelling the cards you've paid off. Cut them up or something, but don't close the accounts.
And while it might not be sensible to use one card to pay off another, sometimes these places will offer you deals such as no service charge (a percent of the amount being transferred) as well as zero or low percent interest. Don't just hop cards as the service charges will often be more than letting the debt stay where it is. If you can get the no service charge for balance transferring to a lower interest rate, though, that could be worthwhile.
Good luck and congratulations on the marriage!
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