Lifehacker has a simple look at how to set up Mountain Lion's built-in text expansion (or, as Apple calls it, "substitution") options. In System Preferences, under Language and Text, you can go in and set up any number of text shortcuts that will expand into commonly-used phrases and words.
There are a few built-in already -- typing "(c)", for example, will give you a copyright symbol. But you can put anything in there, so you can use a few quick keys to punch out your email address or phone number, or use some other phrase for anything you happen to type often.
Developers know how helpful this can be while writing code. Not only can you use text expansion to he
