By loving others. That is the ONLY way that matters.
Wait. What about worship? What about singing songs and celebrating Him? What about prayer and quiet time? What about Bible reading? What about sacrifices? What about tithing??
Nope. Those things are meaningless to God if we are not loving others (Isaiah 58, Amos 5, et al.).
"If anyone says, "I love God," yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen." 1 John 4:20
This is deep. So the only way to love God (whom we have not seen) is by loving others (whom we have seen)? Perhaps the only way we see God is by seeing Him in others? (It's the only way I have ever seen Him.) "...the Kingdom of God is within you." Luke 17:21. "...one God and Father of all, who is over all, and through all, and in all." Ephesians 4:6. Kind of makes the words "Open the Eyes of My Heart, Lord, I want to see You" seem a little silly.
So then, the real question, the only one that matters, is:
"How do I love others?"