Here is an excellent affirmation written by Zig Ziglar. well known motivational speaker and author.
“I,_______…am a person with integrity, a great attitude, and specific goals. I have a high energy level, am enthusiastic, and take pride in my appearance and what I do. I have a sense of humor, lots of faith, wisdom, and the vision and courage to use my talents effectively.  
I have character, and am a smart, talented person. My beliefs are strong, and I have a healthy self-image, a passion for what is right, and a solid hope for the future. I am an honest, sincere, and hard-working. I am tough, but fair and sensitive. I am disciplined, motivated, and focused. I am a good listener and am very patient. I am an encourager, a good-finder, and a forgiving person. I am caring, unselfish, and committed to doing the right thing.
I am family oriented, open minded, and an excellent communicator. I am a student, a teacher, and a self starter. I am obedient, loyal, responsible, and dependable. I have a servant’s heart, am ambitious and a team player. I am personable, optimistic and organized. I am consistent, considerate, and resourceful.
I am intelligent, competent, persistent and creative. I am health conscious, balanced and clean. I am flexible, punctual and thrifty.
I am an honorable person who is truly grateful for the opportunity life has given me. These are the qualities of the winner I WAS BORN TO BE, and I fully intend to develop these marvelous qualities with which I have been entrusted by God.
Tonight I am going to sleep wonderfully well. I will dream powerful, positive dreams. I will awaken energized and refreshed, and tomorrow’s going to be magnificent.
God, my family and my true friends love me no matter what!”