Ekadashi that comes before Chaitrasuddha Punnami is called ‘Kamada’ Ekadashi. Shastra says that fasting and vigil on this day of Ekadashi will fulfill your wishes.
Ekadashi Pujavidhana
On Ekadashi, one should wake up before sunrise and take a bath in the river. If it is not possible, bathe in the bath water after invoking all the holy spirits in the house. After that they should perform their daily tasks only after performing lamp worship and worshiping the Lord. Visit the temple. Those who cannot do it should remember the Narayana mantra in their mind. Doing Gopuja on Ekadashi brings great wealth. In the evening, bathe again and perform Deeparadhana Puja and recitation of Vishnusahasranama or Vishnu Puja.

The word upavasa meaning in sankrit upa-vasa live near to god. It means that on Ekadashi day we should keep aside our usual activities and be close to God. A complete fast should be observed on this day. On Dashami, the day before Ekadashi, one should fast without food from the beginning of Ekadashi, having breakfast at night.
Anhydrous fasting
Some fast without even drinking water. But it all depends on the health conditions of the fasting person. People with any medical problems, old people, children can take fruits and milk as a little solid food!
Bhakta is important:
Devotee is important for Ekadashi fasting. No matter how many prayers you do without devotion, no matter how many fasts you do, the result is null. God needs only devotion. One should fast on Ekadashi with a clear mind and focus on God. Fasting on Ekadashi with devotion gives the reward of infinite power.
The science behind Ekadashi fasting
Generally, if our digestion is to be done properly, if we drink only water without eating anything once a month, all the waste materials in the body will come out and the digestion will work properly. The body gets rejuvenated. Great health secrets are hidden even behind the rituals and rituals instituted by our elders. We request everyone to observe this Ekadashi Vrat for good health!