The simplest and most effect change you can do is learn to laugh and smile more all day, every day.
You hold a vibration in you all day and it goes up and down with your emotions and mood and the vibration you hold effects what you attract and experience.
The higher the vibration, the easier and faster it is to attract what you want because the wave length distance is shorter and return back to you quicker.
If you can hold a higher vibration within you all day the LOA (Law of Attraction) will work easier for you and all you have to do is smile lots.
What makes you smile?