Read the other post first.
Continuing on the subject of changing thought patterns. You have to learn to think positive and you do this by catching yourself every time you think something negative and changing it. Back to a reason to besides the fact you want to. Things like the ten questions give you more reasons to. Challenge every unwanted thought so memory has to find a different solution because remember that solution is going back to memory as an update.
So you want a positive personality, and an assertive attitude so you don't give in to the unwanted thoughts, but more important is belief, you have to believe that the positive thought is the right one and you have to believe you can do this. And you can.
Positive breeds positive and negative breeds negative through storage in memory.
CBT is the hardest simple thing you will ever do. Anyone who has done this will tell you it is so. They will also tell you that it is cumulative. It gets easier with use, to the point that it to becomes subconscious because conscious thought on this is not necessary. It no longer needs direction because it has become a priority solution in memory. And since it is also the relevant solution thought speeds up and there is little chance or reason to go looking for the unwanted thought.
The memory works on relevant not right or wrong so either can be relevant. It is up to you to make the right thought the relevant one.
Intelligence is the ability to look at all possibilities and pick out the most likely one to be right. Imagination is the ability to look at associated memories and see which ones might fit. Panic is the ability to look at negative thought to see if any might fit the situation. Panic is a survival skill, all survival skills are negative. Negative thoughts are longer lasting than positives because they are necessary. Positives are for pleasure and not survival so unless you keep thinking on them they get lost, buried in fact by things more important like negatives that keep us from getting run over or falling down stairs. Negative thought is concern and necessary. Repetitive negative thought becomes worry and annoying when it keeps cycling back through memory. Worry also takes space that more important things need. Worry actually interferes with solutions and remembering things because it buries these more important things. Worry enough and you will get little accomplished.
The way to get rid of an unwanted song in your head is to play something different. Getting rid of unwanted thoughts is similar.
Davit