The ones I included in the attached graphic are some of the affirmations, verses and prayers from the Bible and A Course in Miracles that have taken me through the toughest times in my life. I still use many of these if not all. They are very powerful when read out loud and feeling the words!
I repeat some when I wake up; when a fear thought comes into my mind and I feel that sense of anxiety in the pit of my stomach I'll repeat one that works to calm my mind.
If I have a judgment towards someone I will ask God to help me see this differently.
You don't need many, a few will do the job. You can choose from whatever positive, spiritual material you read, or you can create your own. Keep it close to your heart. Memorize it and make it yours.