Tired of Negative

As a salesperson I am very concerned about my attitude.  I am an emotionally based person (aren't most salespeople) and outside sources have an affect on me.  Why does all news have to lead with negative?  There is enough crap out there to make you depressed all the time.  There is A LOT of positive and happy news - why can't we lead with that information?  Come on people - let's stop this cycle.  For me - I'm shutting off as much as I can that is negative, so I might miss some big news and great Facebook post, but I doubt it...