Fasting is an intentional act done to help us take away distractions and put our focus on God. We can fast from food or anything that we know distracts us or we see is becoming first place in our lives (if its not God). Fasting and prayer go hand in hand. Its a balanced diet. Fasting without praying will be another name for going on a hunger strike. Jesus fasted and therefore we should inculcate this habit as we walk with God. The Holy Spirit should lead us into fasting. Never depend on your flesh, never think you can fast without the help of the Holy Spirit. Listen and be blessed.