I like to think of this card as the "put on your big person pants and get things done." It usually shows up for me when I am feeling incapable of doing things and reminds me that I have the Power to do them, I just need to stand in that Power and break out of the victimy prison I have put myself into.
The Emperor is all about rules and boundaries and putting things into their proper places, and while this can be kind of dull, it is necessary - this is how we get all the things done.
My Tarot Card Practice. I have been studying Tarot for over 20 years now and am still learning new things daily.