Textexpander is a clever tool that, if correctly used, could save you countless hours of typing.
If you spend too many hours a day writing the same old phrases and replies then Textexpander allows you to define keyboard shortcuts to automatically type them for you. Although its not a particularly complicated application, Textexpander still requires a little getting to grips with at first. Its particularly useful for entering time and dates. For example, you can abbreviate the time to the letters "tt" and the time in 24 hour format will appear. This even works for logos and images too.
All of your snippets (i.e. shortcuts) are stored in a list on the left side of the interface you can create groups to keep them organized by relevant subjects. Note that Textexpander works across all applications where you use a text editor so its useful whether you're typing in a Word document or an e-mail. If you get stuck creating snippets, there are some excellent tutorials on the developer website.
On the whole Textexpander is a real time saving that will be of great use to editors, web programmers or just those that have to repeat the same phrases regularly. The only problem I had was on the first few startups, Textexpander froze and I had to Force Quit it for some reason.
Create abbreviations for your most commonly used phrases with Textexpander.