Eat more fiber rich foods. Include fruits, vegetables, nuts, legumes, whole-grain cereals and whole grain breads which are high in fiber. Add fiber to your diet gradually to avoid gas and bloating.
Exercise regularly for 20-30 minutes, such as walking, biking or swimming, which help to stimulate intestinal function.
For more details see below link:
http://homeremediesforyou.com/Constipation