I asked if you set negative goals. Am I crazy? No one would do such a thing!
But you probably do. In fact, we all do it from time to time.
By allowing ourselves to worry about our finances, our prospects of success, our relationships with loved ones, and various situations that we can and do control, even if we do it unconsciously.
Brian Tracy, in his book "The Psychology of Achievement," explains that the act of worrying sets some powerful laws of the universe into action. The attention and emotion that we invest in our worries actually creates the outcome that we do not want.
By now everyone has heard about the Law of Attraction. And those of us who pay attention are even annoyed with it sometimes. When something unwanted happens we're forced to stop and say "Now what did I do to attract THAT?" (Darn that personal responsibility!)
There's also the Law of Expectations - in which we inadvertently create whatever it is we're expecting. The Law of Belief acts the same way. If we belive somethng is so, we'll act in accordance with that belief, and we'll turn it into reality.
It's hard to avoid worry when things are not going especially well ...
But when it comes to events that we can control, it pays to take charge of our thoughts and just - STOP IT!
How can we stop? By paying attention to our thoughts. By noticing when we're slipping into negative thoughts - whether they're worries about future events or "mind re-runs" of situations that went sideways.
And then, by doing some firm self talk. When I find myself starting to worry I say "No. Stop. Think a better thought." (No, that's not an original idea, I read it in a Law of Attraction book.)
The next step is to find that better thought, and dwell on it until the other one fades away.
It can be a positive thought about the worrisome situation, but that isn't necessary. It can be any thought that makes you feel good. Picturing the smiling face of a loved one, thinking about snuggling with a warm puppy, or visualizing yourself enjoying your favorite leisure pastime all work to turn your head around and put you back in a positive frame of mind.
From there, you can plan to succeed.