Not news, but an easygoing summary of recent work on improving physical, nutritional, and emotional well-being--all toward banishing the blahs. The positive-mental-outlook palaver has a CouÃ‰/Dale Carnegie ring (negative: ""I just don't want to go to work today""; positive: ""Wow, with unemployment so high, I'm sure glad I've got a job""); but otherwise Kuntzleman (Rating the Exercises, 1978; The Complete Book of Walking, 1979) comes across as a sensible, helpful guide. His watchword is stress-and anxiety-reduction through improvements in rest and relaxation habits, exercise and fitness, nutrition, relating to others, and ""Taking Charge"" of one's life. Don't try to change all those behaviors at once, he counsels; first, choose one thing you can be successful at. The first first step may be recognizing that boredom is a major problem (""Personally,"" says fitness-expert Kuntzleman, if ""I have to conduct one more exercise stress test I'm going to scream""). Among the specific guidelines, the nutrition pointers, in particular, combine sound advice (no megavitamins or high-protein diets) with myth-dispelling alerts: alcohol and sugar both cause an initial high or energy lift, followed by a long slow fall-off. Reducing diets generally make you feel wretched, Kuntzleman acknowledges; so eat the healthful diet recommended and work out an exercise program by which energy output matches, or exceeds, calorie intake, A friendly primer for those who want to make improvements--lots of improvements--toward a certain goal.