You have the power to distract yourself from and stop, or redirect, harmful thoughts and to be able to focus on positive thoughts.
Keep a journal
Positive things: whether this be one positive thing per day, per week or per hour. Keeping track of the small (and big) positive things can help you see past the negatives.
Gratitude: being thankful for things can have a large positive impact on our wellbeing.
Thoughts and situations
If you find yourself in a situation or thinking about a situation, maybe it's in the past or maybe it's just something you don't have control over, a way to change how you feel is to change your thinking about the situation.
Being aware of the thoughts and making them work for you instead of against you is a helpful way of doing this. You have the power to distract yourself from and stop or redirect harmful thoughts and to be able to focus on positive thoughts. Get them outside of your body and onto paper to make them something physical that you are able to deal with more easily.