NEW YORK ( TheStreet) -- I turn 37 years old on Wednesday. At times like this, we reflect and look for ego strokes.As I was about to stroke the pedals of a Spinning bike Saturday morning, the instructor called me out for my pending birthday. Of the various supermodel-moms assembled in the row in front of me, one turned and asked if I was turning 22. When I told her 37, she smiled in disbelief and said, "Well, you're doing something right." It took me about 14 seconds to relay that story to my wife when I arrived home. I've learned over the years that it's actually good for the mind to bring yourself back down to Earth frequently. I spent much of the rest of the weekend looking back on my investing history. I uncovered several recurring themes that can help reiterate things we already know, should know or never knew.