Being interested in psychology, especially when applied to the web, is more than just reading Cialdini’s Influence. Don’t get me wrong by the way, that book is awesome. But there are just so much more psychological processes at work than people are probably aware of.
One of the most important ones, to my mind, is visual attention. People undoubtedly understand that attention is of importance when it comes to doing, well, anything really. So the same goes for visiting websites. But in my opinion it is not just attention, but visual attention that’s most important for visiting websites.