What steps should I be sure to take prior to releasing a landing page?

I'm getting ready to release a landing page for my next idea. I have the page pretty much ready to go with some copy and an email signup form. I also have some basic analytics set up to track user actions. Do you all recommend I do more work before putting the page up and spreading the word?

Specifically, I'm wondering if it's worth trying to have different versions of the page or different versions of copy to do some A/B testing on signup conversion. Or really anything else that will help me get the most information possible out of the landing page.

Thanks!