Decide the type of fast you will observe: nirjala, phalahar, or partial fast
Eat a light, sattvic meal before sunset on the previous day
Avoid onion, garlic, meat, alcohol, and processed food
Drink enough water before starting the fast if you are not doing nirjala
Wake up early on Mahashivratri and take a bath
Wear clean, simple clothes
Set your intention and begin the fast after prayer
Visit a Shiva temple if possible
Offer water, milk, bel leaves, flowers, and incense to Lord Shiva
Chant “Om Namah Shivaya” throughout the day
Read Shiva-related scriptures, stotras, or mantras
Eat only permitted fasting foods if you are doing phalahar
Use fruits, milk, curd, nuts, coconut water, and fasting flours if allowed by your practice
Avoid grains, legumes, and regular salt if following a strict fast
Keep your mind calm and avoid anger, gossip, and unnecessary distractions
Stay awake at night for jagran if you are observing the traditional vigil
Break the fast the next day after morning पूजा and a bath
Eat a light meal first when ending the fast
Avoid overeating immediately after the fast
Consult a doctor before fasting if you are pregnant, elderly, ill, or on medication