There are usually three main root causes for Planter Fasciitis:
1) Flexibility of the toes
2) Ankle mobility and stability
3) Calf tightness
You have to address these areas to prevent or get rid of Planter Fasciitis.
1) Move the toes. Do bear crawls that force the toes to move.
2) Do squats. These help strengthen the ankle muscles and improves mobility.
3) Massage out and loosen your calves manually or with a machine.