How to do Validation steps in logistic model?



Hi All Please help me
How we validate the logistic model in sas & what are the steps for validation.
I know that first we have to clean the data and missing value treatment, outliers detect. Then split the data into training(70%) and Validation data(30%) . Then run a proc logisitc model where we check the convergence criteria,Goodness of fit, walds chisquare, Concordance, discordance, hosmer and lemeshow test & Ctable sensitivity, specifity but after that what should we do in validation data?
Please help me all…