How to use Voice recognition on the mac

He everyone, I have a macbook running Mount Lion. I would like to be able to use the voice recognition features more then I currently use them. I have figured out the basics such as how to get it to open applications for me and how to get it to go to websites. However, I can't figure out how to write the scripts to get it to do other things like have it go to the address bar, the equivalent of pressing command L. If anyone knows how to do this or has any cool suggestions on what else I could use the voice recognition for, please let me know. Thanks so much, Holly