Ask HN: Getting ready to sell my first piece of software, what should I know?

One of my goals for 2011 was to sell my first piece of commodity software for consumers. As years of hard work would have it, I'm 99% of the way there and that last 1% is what's going to be the hardest.

This is a piece of software that people buy once and then can install on their servers (no SaaS option, yet). It's a web app, but they host it. It's DRM free, written in PHP and customizable.

What should I know about selling it? I have a nice website to accompany it. To help increase sells, I'm going to:

  * have a nice tour of the software
  * full demo
  * small file they can download to ensure it'll run on their servers
  * a way to contact me for support
  * two hours of free support with their purchase
  * Google Checkout and PayPal payment options

What else do you think I should be thinking about when this launches? Getting tracking, reviews, and sales are my primary goals, so what is the best way to accomplish them? What tidbits of information do you have that increase conversions or really help sell your software?

Thank you in advance!