[bergdoll]

I'm not sure if you have had a chance yet - but I found the two online Screencast Tutorials to be absolutely fantastic in getting started.

Two things I did find useful:
1) create folders to store Projects into (as suggested above)
2) indent sub-actions under actions

I'm in the same business as you are (and I also teach), so I will often have an "Area" of responsibility (which I use a Folder for), then multiple Projects within that area of responsibility (Projects), Actions to be completed for each Project, and finally sub-Actions to be completed to for Actions that aren't projects in themselves (indenting)