Start pulling your credit reports from all 3 bureaus and make sure all the info is correct. Make sure there are no mistakes that may bring down your credit rating. A low credit rating will get you a crappy (higher) mortgage interest rate.
From the FTC site:
Q: How do I order my free report?
A: The three nationwide consumer reporting companies have set up a central website, a toll-free telephone number, and a mailing address through which you can order your free annual report.
To order, visit annualcreditreport.com, call 1-877-322-8228, or complete the Annual Credit Report Request Form and mail it to: Annual Credit Report Request Service, P.O. Box 105281, Atlanta, GA 30348-5281. The form is on the back of this brochure; or you can print it from ftc.gov/credit. Do not contact the three nationwide consumer reporting companies individually. They are providing free annual credit reports only through annualcreditreport.com, 1-877-322-8228, and Annual Credit Report Request Service, P.O. Box 105281, Atlanta, GA 30348-5281.
You may order your reports from each of the three nationwide consumer reporting companies at the same time, or you can order your report from each of the companies one at a time. The law allows you to order one free copy of your report from each of the nationwide consumer reporting companies every 12 months.