For believers there is no substitute for attending church.  Besides something that pleases God, it is important for a Christian's well being.

It is important to attend church because:
(1) It is an expression of our love and commitment for God
(2) It builds up our spiritual strength
(3) It brings a special visitation of the Lord's Presence
(4) It provides fellowship with other Christians
(5) It is an act of obedience to God
(6) It provides accountability to spiritual leadership
(7) It combines our spiritual strength in prayer
(8) It honors the Lord's Day
(9)It acts as a witness to nonchristians