Before submitting your website, make sure it is technically correct:
Your website does not trigger any error messages (e.g. it runs under standard browsers like Netscape Navigator and Internet Explorer).
File sizes of images are optimized.
Pages/site have meta tags and titles.
There is a Noframes section (only if you are using frames).
Your links work properly.
etc.
Tip: Use the Site Checker to check your website for possible errors.