Changing selection priorities
If you ever use a curve to extrude, you might find it's a pain to select the curve again because it's in the middle of the geometry. You could use selection masks (turn off select polys or NURBS or whatever). However since this is a frequently occuring annoyance for me, this trick seems to work pretty well.
Window > Settings/Preferences > Preferences > Selection tab > Priority Presets Custom > set NURBS Curve Priority higher, like 5 or 10. Now the selection priority is higher so I can more easily grab that elusive curve. A higher number seems to indicate a higher priority (kinda backwards, since I think 'this is my #1 priority'... anyway). You can also set priorities for pretty much anything else you can think of... locators, clusters, bones etc. Hope it's useful to people.