Remember these simple rules when designing any new system that interacts with the human user:

• It must look elegant and appealing to the eye — first, it’s all about the presentation
• It must fail, if ever, gracefully — it will happen and better prepare for it
• It should have an element of surprise and enlightenment — give more and delight the user
• It should be designed for the good user in mind — hackers will always try to exploit the system, so dont penalize the good user
• Think about performance and think it thorough — second, it’s all about the functions
• Dont forget the grandma rule — your grandma should quickly learn how to use the system
• Every system will require some training and have that in mind
• Dont forget to have fun with it — it’s your life and your time going into it