If something is wrong, fix it if you can. But train yourself not to worry. Worry never fixes anything.

Never worry about what you can't control...Focus on what you can.

Keep your head up in failure, and your head down in success.

Do the best you can, and don't take life too serious.

Why worry? If you've done the very best you can, worrying won't make it any better

You just hold your head high and keep those fists down. No matter what anybody says to you, don't you let 'em get your goat. Try fightin' with your head for a change.
-Atticus Finch

If you've done the best you can-if you have done what you had to do -there is no use worrying about it because nothing can change it .........and you have to be fresh for the next day. What you're going to do is more important than what you have done.

don’t worry about whether you’re better than somebody else, but never cease trying to be the best you can become. You have control over that; the other you don’t.

If you're doing your best, you won't have time to worry about failure.

I do not worry too much; if I do my best, I believe that what happens, happens for the best.

ALWAYS DO YOUR BEST

If a problem is fixable, if a situation is such that you can do something about it, then there is no need to worry. If it's not fixable, then there is no help in worrying. There is no benefit in worrying whatsoever.

Do not anticipate trouble, or worry about what may never happen.
Keep in the sunlight.

Just do the best you can. No one can do more than that.