Initially, you start preparing your heart through prayer and reflection. You could begin your fast by skipping lunch. You will consume food normally until the specified date. Consume a typical breakfast. (Hot spicy foods should be avoided at the last meal.) Throughout the day, you should consume no solid foods and drink more fluids than usual to prevent dehydration. In the evening, you would consume your usual dinner. This is not that difficult! Some may prefer the one-day fast to start with the previous evening's dinner and continue until the next evening's dinner. Observe the term "breakfast." We fast while sleeping and "break the fast" with breakfast. You determine the duration of your fast.