Brain Tracy in his book Kiss The Frog shares these seven steps to become a completely positive person:

• Speak to yourself positively.
• Visualize the exciting picture of your goal and replay in your mind over and over.
• Surround yourself with positive people and avoid negative people at all costs.
• Provide yourself with positive mental food by reading material which is educational, inspirational or motivational.
• Dedicate yourself to learning and growth.
• Have positive health habits, including exercise and healthy eating.
• Control your expectations and expect the best. Expect good and good to happen.