If you're worried because you have great credit, but your wife/husband doesn't, don't worry: you and your spouse have separate credit files and they don't have to affect each other.
In fact, depending on what state you live in, you're probably not even repsonsible for bills your husband or wife runs up under their name while you're married. But if you have joint accounts or co-signed a loan, you are both equally responsible.
This video recommends that married people have at least one credit card in their name only and that you don't let one spouse's bad credit affect the other spouse's credit score.
For more credit tips for married couples, visit http://UnionPlus.org/CreditEducation