F - Fast not just from food, but also from things that you enjoy, like hours of surfing the Internet, watching movies, and so on.
I - Influence others to do acts of charity and kindness.
S - Spend time in prayer. Stay still with Jesus.
H - Have a firm resolve to improve yourself by letting go of things that keep you away from GOD.
--> From FISH magazine, April issue. I have just read it today. :)