Laura Rogers @WonderLaura

Just thought I'd let everyone know where I learned everything I know about workflows.  This site is friggin awesome, and the tutorials are very detailed.  You can tell that this guy, Stephen, put a lot of work into this.

http://office.microsoft.com/en-us/sharepointdesigner/HA102564171033.aspx

Then, just recently, by popular demand, he posted all of the associated files that he used in his demo!!

http://blogs.msdn.com/sharepointdesigner/archive/2009/01/27/visio-diagram-and-site-template-from-office-online-workflow-videos.aspx

It might take half a day, but I recommend that you go through all of his tutorials when you get a chance.