Link to completely understand Clustering, regression modelling - and practice datasets

[Darpnew]

Dear SAS users,

I am looking to get some helpful regarding below points. although I know that SAS 9.2 userguide explains the things in good detail, still I am looking forward to more stepwise approach

1. want links which can take me through all the steps while performing various clustering analysis, why a particular clustering method should be used in different situations and so on, and more importantly how to interpret various statistical outputs

2. similarly - looking for stepwise guide to do regression

3. looking for practice datasets links

Requesting your responses please.