If you aren't familiar with TextExpander, it's a great tool to save keystrokes by saving your most typed words and phrases. I use it for a lot of things, especially email signitures, canned responses to emails, and websites I use all the time.
For example, if I type "//ey" (short for "engine yard", where I host), it automatically replaces it with "https://cloud.engineyard.com/app_deployments/113792/environment", which is the full url.
However, many people don't know that you can do more than just have static text in it. One of the things I find myself doing constantly is taking a phrase for articles, such as "Sous Vide Chicken Breast" and wanting to sprinkle it throughout a document.
The issue is that the capitalization depends on if I'm using it at the start of a sentence ("Sous vide chicken breast"), middle of sentence ("sous vide chicken breast"), or a header ("Sous Vide Chicken Breast"). So I'm constantly pasting in "Sous Vide Chicken Breast" and changing the letters one at a time.
Using the dynamic functionality of TextExpander, I can paste the correct version I'm looking for and it'll paste it automatically.