1.Declaration of faith
2.Pray/Worship (5 times a day)
3.Fast (in Ramadhan)
4.Alms-giving (2.5% of one's wealth)
5.Pilgrimage (to Makkah)
All religions have concepts of the 5 items above but it is elucidated in the 5 pillars of Islam so well!
The list looks very simple but it is so profound.