As the old business adage says:
"You can't manage what you don't measure"

You will get so much useful information about foods, impact of exercise, etc if you do testing. Warm your hands first, rub them a bit after washing in warm water, then prick just to the sides of the finger pad...but not so far to the side that blood flow is reduced. I went overboard on what was the "side" at first.
http://www.everydayhealth.com/type-...ger-prick-pain/