I have been thinking about this too.
Some good considerations are:
- lots of content
- good about page
- privacy statement
- tell cpa you want to use banner ads on your site for method
- make it look as "nice" as poss
- I heard some ppl like lots and lots of text content and less media content e.g. this may cause a copyright issue if you are posting pics and vids in content on the site
I am interested as I am in a similar situation. I want to take time to create one site that is almost definite to get accepted then use for all rather than messing around with being rejected.
There are some ways of applying through telephone - search for that here.
Sites I was thinking of were article database (although would take ages), news (be careful of poss copyright stuff), tech or corporate style sites would do well.
You can also pay someone here to build a site specifically for it.
Hope this helps.