The most important Muslim practices are the Five Pillars of Islam.
The Five Pillars of Islam are the five obligations that every Muslim must satisfy in order to live a good and responsible life according to Islam.
The Five Pillars consist of:
Shahadah: sincerely reciting the Muslim profession of faith
Salat: performing ritual prayers in the proper way five times each day
Zakat: paying an alms (or charity) tax to benefit the poor and the needy
Sawm: fasting during the month of Ramadan
Hajj: pilgrimage to Mecca