I'm considering writing about top tips for print designers working on the web. Right now all I've got is "Your baseline grid doesn't exist" and "Think about it before you make it different". Any 'top of the list' thing y'all can think of?
Malleability. You aren't designing for one type of paper run through a specific printer with controlled results. It's like designing for thousands of output variations. Multiply this several times when you consider *editable* text (pervasive) or multi-lingual content.
Evolving. The tech behind design for web is improving super fast right now. Embedded fonts, programmatically rendered and animated elements with CSS3, & much more. Learning about these things, even if you don't use them, helps.
States. A printed page is an artifact left behind. Interactive interfaces like web pages have loads of potential states: rollovers, animation, transitions, media elements, etc. Also consider visitor's context as a state.
Oops ran out of letters...