Text Expander Saves Typing and Time.
TextExpander 2.5 ($30) isn't for everyone, but if you find yourself typing on the computer on a daily basis, text substitutions can save you a lot of time. TextExpander automatically expands abbreviated text snippets into predefined words or phrases. It can also run scripts based on what you type. As an example, whenever I type "ctadd" on my Mac, TextExpander automatically replaces that abbreviation with the full CreativeTechs mailing address.
Source: This tip inspired by my recent visit to Forget Computers, a Mac IT support company in Chicago, whose team uses TextExpander every day. This write-up also inspired by a tip in the November 2008 issue of Design Tools Monthly.