Wisdom for the ages

This is a collection of essays offering advice for living wisely organized by various age groups and circumstances. There is no widely accepted reference for this type of advice. Use good judgement to choose suggestions from these lists to suit your circumstances.
 * /Guidelines for getting along/
 * /Wise advice for 30-year-olds/
 * /Wise advice for young engineers/
 * /Wise advice for aspiring process engineers/