STAT!Ref has made a short video tutorial available for the new user interface they recently rolled out. It's only a few minutes long, but might be just the thing to introduce you to this excellent resource.
This and other STAT!Ref training and help materials can be found from the main STAT!Ref page after logging in, in the panel labeled Training Center. If you don't seen the training center, click on the STAT!Ref logo at the top of the page.