In any given day, the number of things you can think about is finite.
You have to make choices about what you allow to occupy your mind.
I had the epiphany a month or so ago that I was giving up a huge percentage of the space of my brain to thinking about things that were not truly what I wanted to be focused on. It occurred to me that if I removed those things from my life, I would open up a tremendous amount of real estate in mind. I would be able to spend time thinking about things that truly excited me and that produced a much better return on investment.
Your brain is valuable real estate.
What are you choosing to fill it up with?
Jessica Lawrence Quinn 
I was just talking about this with a friend because I believe that your thoughts become your reality. Lately, my mind has been way to obsessive about the stresses of life and I need to free up some real estate too!
Absolutely Annette! There is research to support that concept that when we let ourselves be overcome by anxiety about something we can actually cause what we are trying to avoid. Being mindful of what you are allowing to take up space in your mind is so important.