Psychologists and psychiatrists typically use the criteria listed in the Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV) as a guideline for diagnosis of bipolar disorder and other mental illnesses.
On the American Academy of Orthopaedic Surgeons website, there is a helpful pictorial guideline to performing a variety of stretches for every part of the body, including the shoulders, lower back, hips, knees, calves, and hamstrings.
According to their website, although they don't have to meet any U.S. Food & Drug Administration guidelines regarding sodium, they state "we maintain a self-imposed guideline to ensure great taste and good health..."
This guideline is far from being hard and fast -- certain Motorola cell phones, for example, can play MP3s but cannot play videos -- so it is best to check with your local retailer or directly with the manufacturer.
Some couples may choose to follow this cost guideline, but in the end a couple should be comfortable with the amount they choose to spend regardless of how many or how few paychecks are needed to pay for the ring.
The American Diabetes association recommends that those observing an American diabetic diet utilize its Diabetes Food Pyramid, which differs from the USDA Food Guide Pyramid, as a guideline for planning meals.
Again, this is just a general guideline of where you might want to be; if you're far from it, a sample diabetic diet 2000 calories can inspire you toward restoring balance to your weight and your health.
The idea of spending the equivalent of two months' salary for an engagement ring is a guideline perpetrated by the diamond industry that has no real bearing on what a couple should realistically spend.
A bit of simple makeup, toned-down jewelry and perfume and a classy, but not too conservative look is a good guideline for women - guys can never go wrong with a bit of grooming and subtle cologne.
Simply drop a few tablespoons of salt into the tub (the directions on the packaging are a guideline; many find that results vary according to tub size and personal preference for scent strength).