A case for evergreen, not the color, the term EVERGREEN in the writing world means something that never goes out of style. As new generations appear in the work force certain ways of doing business or of social interaction remain constant. In today's litigious and politically correct world it becomes increasingly more difficult to directly instruct on social decorum.
Ultimately most evergreen articles reside with the 'how to realm.' It helps if they come with examples, wit, and relativity to current events. Statistical evidence to support assertions often help convince the hardened pessimist. Recommended reading: anything by Letitia Baldrige.