The REVIT video tutorial (in HD) below has several nice little tips for you.
1. How to add in stair 'winders' or split up a landing
2. How to make the top of the stair clean up better at the top riser.
3. How to use the split tool for the stair boundaries to change the stringer configuration.
* For best HD video resullts do this in the following order
a) click the Play button
b) click the HD button (wait for video to reset)
c) then click the Full Screen button.