For those people observing Ganesh Chaturthi Vratha, here are the following simple rules to follow:
1. Observe fast all day on Ganesh Chaturthi (you can take water, fruit juices)
2. Fast is to be broken after witnessing the moon at night
3. Visit Ganesh temple or do puja in the evening at home.
4. Chant simple Ganesh Bij Mantra "Om Gam Ganapataye" Namah 108 Times with intense devotion.
By doing the above with devotion, by the Grace of Lord Ganesh you will overcome all life's obstacles.
May Grace of Lord Ganesh be upon you.
Om Gam Ganapataye Namah !!