Electronic Performance Support Systems are a fabulous concept, as pioneered by Gloria Gery back in the early 90′s.  The notion is that as you use a system, and have entries or decisions to make, there are tools available that can provide guidance: proactively, intelligently, and context-appropriate.  Now, as I heard the complaint at the time, this would really be just good interface design, but the fact is that many times you have to retrofit assistance on top of a bad design for sad but understandable reasons.

via Learnlets » Layering learning.