What would be best for my credit?

by eyewash
Question by Jewelianna: What would be best for my credit?
We have about $ 20,000 in credit cards. We just did a balance transfer of about 4000 (equivalence of two cards) onto a card with 0% APR for 12 months. We'll have it paid off in ten months now that we won't have to battle the interest.
I was told that closing accounts negatively affects your credit, but I don't want the temptation of two empty cards.
So which would be worse:
Have two closed accounts, which would make it

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