The Internet is the Medium, not the Message.
Read that. Read it again. Remember it. The medium changes- book–>newspaper–>radio–>TV–>Internet.
Even when navigating new communication paradigms, the message remains the same, only transmitted along a slightly different medium.
So when building your awesome world-changing web application, don’t worry so much about the medium. Focus on the message, which remains very constant, and always will remain constant. I was reading “Scientific Advertising” a book written in 1923, and was struck by how much everything in it can be applied to modern Internet advertising. The similarities are incredible, and perplexing as they are at first, it all makes sense when you realize that even the medium hasn’t changed that much- unless you’re a video site, you’re still basically working with a print medium, not all too different from a newspaper.
You can take lessons about writing newspaper classified ads from the 1920s and apply them, almost verbatim, to writing Google AdWords ads. It’s the same format- three short 45-character lines to sell something, just on a different medium.
Focus on the message 