A thing I picked up from beaver. I know people hate him, but his text is pretty friggin rad in some of his memes.
Stacking text boxes pretty much. If you make the top layer of text ONE point smaller than the bottom and line it up right, then on the bottom layer of text make sure the out line is down to to say... a 3. It seems to have the best effect. I am still messing around with it a lot. I used to try doing cool stuff with text in the past but It felt a little limited. I never would have thought about stacking text boxes. That guy is a texual genius.
A couple of others I have done this on: