I think it is a very good idea, some search engines don't pay as much attention to them as they used to (such as Google) but others still do.  As long as your not stuffing keywords in there just for the sake of adding them, should help you out in the long run for sure.

Yes, meta tags and descriptions would be good for the regular pages.  Here is a great article on how to get that done:

http://searchenginewatch.com/showPage.html?page=2167931

For more on lending the robots and spiders a helping hand, I think you may want to look into adding a robots.txt file into the main directory for your domain.  An example of this would be the "public_html" folder for your primary domain via the Basic and Business accounts.  You can learn more about the robots.txt file here:

http://www.robotstxt.org/

Hope that helps get you started at least.