Proof reading on a mac - speech utility

Proof reading is a difficult business some people pay others to proof read their documents, save your money and get your mac to do it. Yes your Mac can talk to you; and you can harness this power to get your mac to read documents to you, essentially proof reading them.
To get past our own inbuilt desire to see a document the way we think it sounds rather than actually what we have written you get your Mac to read your document to you. I suggest using Alex the system voice as this is the most advanced...certainly in Leopard mac 10.5
Now how to do this... set up text-to-speech in System Preferences. Click on Speech, then the Text to Speech tab.
Heres where you can select the supplied voices. When you've decided which voice to use, check the box marked "Speak selected text when the key is pressed" and click the Set Key… button. Then set the key sequence you want to use to start the mac reading your text.
Then simply select the text you want read, then press the key command, and your mac starts speaking. Press the key command again to stop.
TextEdit, has some of this already built in and I would say is an underused tool in the mac applications folder.