What is the most important point before worshipping God?
Imam Ali (A.S) said: First of all place the knowledge and recognition of the one you are worshipping in your heart, soul, spirit and life. Find out fully who you are worshipping so that all the actions you do with all of your body parts and senses can be counted as your prayers and worship in order that all those prayers can benefit you, otherwise prayers without recognition of the one who you are worshipping, will have no use for you.
Source: [Tohaful Oqool, Page 223]
Other links:
The Tongue of the Wise Man
Who is Happy?
Prosperity