While I was thinking about Math and the Universe, I saw how Law of Attraction works like an algebraic equation. What manifests in your life matches the vibration you give out. In other words, your vibration is on one side of the equation and it equals, on the other side of the equation, what you are living.
To make it simple: your vibration = what your are experiencing and living.
So, to change what you are experiencing and living, doesn't it make sense that you would need to change your vibration?
How do you do that?
Your thoughts and feelings are your vibrations. Think different thoughts than what you are used to thinking, you will feel differently. Better yet, as Abraham-Hicks recommended so eloquently: "Think better feeling thoughts." Then, as you practice thinking better feeling thoughts and feel better, you vibrate differently.
How do you know what you are vibrating? You know what you think, don't you? Besides, your emotions and your experiences tell you that information.
For example, if you are fighting a lot with your child (that is the experience that you are living), then on the other side of the equation are your vibrations of frustration, anger, hopelessness, sadness, etc. plus your thoughts of "This will never change, this is hopeless, she is so unreasonable, I am so mad at her, why does this happen to me, I don't know what to do, etc."
When you observe your thoughts and emotions, you will quickly notice that all of them boil down to just one or two overriding thoughts. They could be "Life is unfair," or "This is so hard," or "I never have it easy," or "I am not good enough," etc. These thoughts are what you vibrate. This vibration is what you send out to the Universe and what is being picked up by Law of Attraction, which gives you other experiences that match these thoughts. Once you change these habitual thoughts to better feeling ones -- even just allowing yourself to think: "It is not true that [original thought]" -- your experience will change.
It has to. Mathematically speaking.