= Schneiderman's 8 golden rules =

* Consistency
  * Make the UI consistent
  * Same icons, same arrangement
  * same layout across suite of applications
* shortcuts
  * great for power users
  * Make them consistent
* informative feedback
  * give feedback to user about action being/about to be performed
  * folders are highlighted when clicked
* dialogue
  * something to get attention of user
  * provide simple options to resolve issue
* error handling
  * gracefully deal with errors
  * keep the user still engaged
* Permit reversal of actions
  * IE ctrl z
* Support internal locus control
  * double check that the user wants to perform dangerous actions
* reduce short term memory load
  * Make common actions easily accessible

* Don Norman
  * author of the design of everyday things
  * devised two gulfs
    * execution
    * evaluation
  * questions to ask
    * What to accomplish?
    * What are alternatives
    * what can i do?
    * How do i do it?
    * What happened
    * what does it mean?
    * Is it okay?
  * Principles
    * discoverable
      * easy to determine possible actions
    * feedback
      * give full and continuous feedback about results
    * conceptual
      * design projects all the info to create a good model of the system
      * lend itself to understanding and control
    * affordance
      * proper affordances with desired possible actions
    * signifiers
      * make feedback well communicated and intelligible
    * mappings
      * relationship between controls and actions
    * constraints
      * providing constraints to not allow user to do certain things
      * ask user before dangerous actions