Here are 4 of my favorites:
1) I can achieve greatness.
One of the most influential ones is to tell yourself on a daily basis that you can achieve all the greatness in life. Focus on your vision and dreams and then attach the emotion to that vision. By telling this to yourself and believing that you can achieve greatness, it will eventually turn into reality.
2) Today, I am brimming with energy and overflowing with joy.
Joy starts from within not from outside of you. It also starts as soon as you rise. So make it habit to repeat this to yourself first thing in the morning.
6) Everything that is happening now is happening for my ultimate good.
There are no victims, no accidents and no coincidences EVER. They simply do not exist in this reality as you will only attract what you are a part of. So know from the bottom of your heart that everything happens for a reason and in perfect synchronicity. You are at peace with all that has happened, is happening, and will happen. Your fears of tomorrow are simply melting away.
7) I am the architect of my life; I build its foundation and choose its contents.
This is something that you should tell yourself when you wake up every morning. Every new day offers a fresh start and also makes an impact on others around you. You can make anything of that day that you like because you are the architect of your own life. If you begin your day with a positive thought and feeling it will transform your day into something incredible.