Be sure to always have a handle on what your credit score is currently at.  A simple way to keep track on it is to sign up for a credit monitoring service - this also works as a backup to make sure that you have no chance of loosing any of your personal information to identity theft.

Or you can request credit reports from the main credit reporting agencies.

1) TransUnion - www.TransUnion.com

2) Equifax - www.Equifax.com

3) Experian - www.Experian.com

You can request your credit information from these companies at any time.  They will each most likely give you a different score - one way to determine your over all score is to add the 3 scores together and then divide by 3.