I once listened to a lecturer from a reknown university describe an experiment they were conducting. They gave volunteers a "pager" (goes back a ways) and the only thing they asked the vols to do was to record their thoughts anytime the pager went off. Their findings were that the majority of the time people were either complaining verbally about something or having negative thoughts about a situation. This in a land of liberty, freedom and plenty. This gave me lots to think about and I've been reminding myself about this lecture anytime I start to get negative about a petty thing.