Each & every single one of us has a worry of some kind. I guess it's just part of being human!
As in life, some days & trials we go through are without a doubt harder then others as with some people just have a harder time in life as others. . .
I remember back in the 70's, what one of the greatest swimmers that's ever lived said the following (Mark Spitz) : "The pool is terrible, but that doesn't have much to do with my record swims. That's all mental attitude." -Mark Spitz
Personal items & stuff that may bring you a happy memory & may cheer one up, a simple picture or photograph my sometimes do the trick, or perhaps even a smell or aroma.
Try to surround your day and areas you frequent with little things that may bring a little bit of an attitude adjuster in it!