General
You've already been there
After I wrote back in February about a nice touch on the happygiraffe.net site, today I noticed another site with a similarly handy differentiation between links you've already visited and those you haven't: Design Melt Down. The gallery thumbnail links get a nice clear border and bar with text telling you you've already visited the site (where appropriate), allowing you to quickly get back to sites you looked at before and want to check again, or alternatively to mentally filter out the ones you've already seen. The idea worked well on happygiraffe in the side menu, but in a gallery of linked thumbnails it's brilliant. People will often go back to an image gallery and want to start where they left off, or find the ones they missed first time 'round and this method makes that process infinitely easier. Design Melt Down's a great site for checking out examples of different design styles, methods and colour schemes working well anyway, but this feature adds the icing to the cake.