Top 10 Design Mistakes in Web Applications

Worth a read for developers and anyone involved in Web development, Jakob Nielsen’s Top-10 design mistakes in web-applications. The ones I tend to run across the most that make me want to pull my hair out are:

6. Asking for the same information twice

and

10. Offering system-centric features that reflect the system’s internal view rather than the users

I believe both of these problems tend to occur when the same person who’s programming the database is given free reign over the user interface. (Not that this is always a bad thing – given the right expertise)

Typically though, you’d end up with a transaction-based user interface, one that has every input from the user delegated to a dropdown menu or text field, and no predictive or intelligent affordances for pre-populating information.