Have a look at HTML5 Boilerplate. Download and play around with it and look on the website why they have done everything the way it is. That should give you a good insight to HTML5.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.