Creating Text Shortcut

Before I upgraded to 10.8 I had setup and easy way to enter my email address by hitting "CMD" and "x" button at the same time. This would save me from having to type in my email address every time I needed to type it in for something. The thing is I forgot what I did to get that setup and I need help. I beleive I did something through automator to get it set up the first time. Any help would be gratefully appreciated!

Thanks,

Brandon