The problem becomes with worry overcomes the optimal time for reflecting on the past and future. Worry can evolve into stress; Overpowering stress becomes unhealthy. Unhealthy bodies lose time in life.
So - what is the antidote to worry. Action can be one potential antidote. Action takes time and usually eliminates the time available to worry. "Just do it" comes to mind. Or Bob Edward's famous one liner - "So what are you going to do about it".
Concentrating on what you can control (in Covey's language your circle of influence) and keeping what you can't control out of your "worry space", can be perfect visual to help you spend less time worrying.
|Covey's Circle of Influence|
Worry about that. :)