Just received this reminder from a good friend of mine who assists folks with their credit...good information:

"OUTSTANDING CREDIT BALANCES HAVE A 30% IMPACT ON CREDIT SCORES.

Debt ratio of outstanding balance to available credit is important. Keeping that below 50% is wise and below 30% even wiser. It is never a good idea to close an account; the debt ratio will go up and the number of seasoned lines will decrease. Pay outstanding debt down as close to zero as possible and evenly redistribute the remaining balance among the open lines. The increased interest incurred by moving a balance from a 0% card to a 23% card will be
minimal relative to what the increased mortgage debt might be with a low credit score. Hitting the maximums of available credit can be very negative. It may be worth calling and asking the credit company to increase your available credit to lower the debt ratio, PROVIDED THEY CAN DO SO WITHOUT A HARD CREDIT
INQUIRY."