I enjoyed this post over at TextExpander.com showing off some of the more fun tricks you can pull off with TextExpander. I would add to this that the ability to add emojis with keyboard shortcuts is pretty useful and more than a parlor trick. I've done something similar but use shorter abbreviations than recommended in the linked post. For instance, when I type “:tu”, TextExpander autofills a thumbs-up emoji: 👍🏻.
I find myself using these to respond to text messages and even simple emails all the time, and assigning your favorite emoji to TextExpander shortcuts can save you a lot of time.