The one thing that there is almost never enough of is examples. Simple examples... complex examples... complete working examples... If it's got a feature, don't just "document" it, show us an example. If there's more than one way to do something, show us an example of each. No amount of verbage can replace a good working example. In fact, if you have to choose between writing long paragraphs describing in detail the reasons behind each design decision or writing a few good examples, write the examples.