I would recommend looking at getting a wordpress website. the number of templates out there for these kinds of sites is incredible!
another tip would be YES - do update content regularly, google and similar prefer this. You can do this through a blog or newsfeed. You can link twitter and your website, so everytime you tweet, it updates your website.
don't have spelling mistakes or grammar mistakes - it's lazy and looks bad.
the argument about getting a website up and having content "coming soon" - you can just have a single page of your website and add new pages as you have got the content. but seriously, like someone else said you don't need long pages of writing - nobody will read it anyway