clipped from: www.smashingmagazine.com   

5. One common mistake you should always avoid developing web-sites

Starting with a wrong approach.
Designing before planning.
  • Thinking that at some point you’re done.
    Successful websites are organic. You are never done.
    • Rushing in.
    Having a print mentality.
    Not accounting for unknowns.
    Planning up front.
    Copying ideas.
    Copying yourself.
    Putting yourself or/and your clients first.
    “I’ll fix it later”.
    Leaving the content until last.
    Making it more complicated than it needs to be.
    Never concentrate on only one thing.
    Sticking to your plan — whatever happens.
    Starting to test your site with IE.
    Narrowing your perspective.