I've always liked Isobar's standard [1], which is a bit more detailed in some areas, like image formats. A read through HTML5 Boilerplate's [2] documentation is

I've always liked Isobar's standard [1], which is a bit more detailed in some areas, like image formats. A read through HTML5 Boilerplate's [2] documentation is a good introduction to a few best practices too and it makes a good starting. 1. http://na.isobar.com/standards/ http://na.isobar.com/standards/ 2. http://html5boilerplate.com/ http://html5boilerplate.com/