[header] How to fast for a day [title] Clarify your purpose in fasting. [step] Ask yourself what you wish to learn from the experience, and use this purpose to set an intention for the day. You may find that you get much more out of the fast if there is a drive behind your discipline. 
Consider whether you have any goals for spiritual or mental development, or whether you are simply trying to tap into the physical benefits. Meditate on a theme, a question, or a goal.