The last time I used FW or DW was around 2000 when design conventions were clearly different than they are today. Back then there were so many fewer options for designing and things were more simple. Is there some sort of website or resource that describes elements and conventions of a nicely designed html/css site in 2011?
For a good basic tutorial on the current approach to building a site, try this:
Some good resources:
Some sites I've found some good stuff on:
And...well...just explore the links from these sites till you find ones you like. Good design is good design. It's just that (as with any medium) you need to understand the advantages you can exploit and the limitations you must work within.