A helpful thought is one that makes you feel energized, hopeful and/or peaceful.
Therefore, a simple mental health management tool is to ask yourself whether a thought is helpful or not helpful, rather than right or wrong.
If the thought is not helpful, then declare it as  unhelpful, take a deep breath, and replace it with a thought that is helpful or an action that is helpful.
Take care of yourself.
Kevin
P.S – you can get more ideas for help at