Preaching

I Corinthians 1:18: For the preaching of the cross to them that perish foolishness; 

but unto us which are saved it is the power.

Worship

Hebrews 13:15: By him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name.

Singing

Hebrews 2:12: Saying, I will declare thy name unto my brethren, in the midst of the church will I sing praise.

Fellowship

I John 1:13: That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ. 

Giving

Malachi 3:10: Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith, saith the Lord of Hosts, if I will not pour you out a blessing, that there shall not be room enough to receive it.