Anything to do with workflow in Aurora would be good. Putting the workflows in the correct order and querying to do something, any tips or tricks would be useful.
Editing a shape - can you delete multiple nodes by CTRL or SHIFT clicking? General manipulation/erasing/slicing/joining of objects. This causes the most consternation for our staff and I have to admit I struggle a bit myself.
Tips to do with Page Layouts would be useful and setting up legends outside of the auto legend button - just found out that you make it so you can choose a legend image when printing, so anything else along those lines, that allow you to make the legend more configurable.