Depending on your circumstances (i.e. whether your servers are hosting 3rd party systems or database supporting applications developed by your company etc.), it can be worth going through the list of deprecated features for both SQL 2008 and future versions.

See http://msdn.microsoft.com/en-us/library/ms143729.aspx

If you can remove features that will be removed in future releases now, this will help smooth future releases as well.