If you are a user of sublime text (I hope you are, it kicks ass. You can get it here), then you may have already noticed some of the tab completion capabilities. For example, when you are opening an html tag such as <p>, it automatically closes the tag as soon as you type /. You can get similar functionality for pieces of code you end up re-writing over and over, and it's surprisingly easy!

Here's an example, which activates after typing div and then tab:

Click Tools > New Snippet... in the navigation bar. This will open a snippet skeletton file which will look like this:

You will add the snippet by replacing the text Hello, ${1:this} is a ${2:snippet}.

In the case of the div snippet, it's as simple as placing the following text in the snippet area:

<!-- $1 -->
<div class= "$1">

</div>
<!-- $1 -->

The $ operator references the variables that will be typed in once you type div and then tab. In fact you can have any number of them!

Save the file. You can give it any filename you want, but the extension must be .sublime-snippet. Remember, you can only have one snippet per file! I like to give them descriptive names such as html-div.sublime-snippet.

And there you have it! You can get as creative as you want.