Here’s a useful one I can’t believe I didn’t know before today:
Let’s say you have a clip that you want to extend longer. You can click the edge of the clip and drag it out. That works. But an instantaneous way to do it is to use the “Extend Selected Edit to Playhead” feature, whose default keyboard shortcut is “E”.
Ensure the playhead is where you want the clip to extend to. Then click the edge of the clip (the “edit point”). Hit “E” and boom, done.
I think this will be most useful when trying to fill in gaps between clips. Either way, I wish I’d learned this one years ago.