God commanded the Jews to fast on the day of Atonement - Leviticus 23:27-29
During the time of Jesus, Pharisees fasted twice a week - Luke 18:!2
Church was acustom to fasting - Acts 13:2, 14:23
Getting practical
Making it a part of lifestyle
Fast with a purpose in mind - bear fruit, find a job, closer walk with God
Decide how long you intend to fast and stick to it