CSS. My brother's been urging me towards a great article at Webmonkey, but at the moment the link is beyond my reach. Also, I just found this.
Pay attention to UI design. Large numbers of people using MS products now expect that when they pull down a nav menu in 'form' format, it'll act without them having to push a button to make it do so. A relatively simple Javascript trick, that, but it can make you rethink how the PHP would work for the JS impaired.
Also, if the site has more content than, say, 3 or 4 pages, a search box in a prominent location can help 'win friends and influence people.'
Now, all that said, I need help with graphic design, too. I'm just awful....
Heck, I need help with everything...that's why I come here 🙂