The spirit with which one comes to church; and the maintenance of (that spirit) throughout the service(s), are of great importance to God.
Seek, by grace, to put out of your minds all carnal, secular, and otherwise unnecessary or disturbing thoughts and notions. Recognize that the devil will work on you more during the church worship of God, than at any other time of your life.
Adopt an attitude of praise; and lift up genuine heartfelt adoration unto the Lord—especially while singing hymns and psalms. When confessing your sins, or your faith—do so with gusto—knowing that God hears what you say, and holds you to your words.
As you listen to the Word of God preached, do not sit in judgment on it (the word), nor on the preacher of it. Instead, recognize that God is speaking to His church, in a special covenantal way, during the sermon, (which is the height of the cognitive dimension of the worship service). Therefore, be humble and receptive. Those who hear Christ’s ministers, hear Him. Those who reject them, reject Him.
It is not an easy thing to worship God well, or aright. Take comfort from this fact: that the Lord is more concerned about the state and inclination of your heart, than He is about anything else. If you truly love Jesus, be encouraged: your church worship *will* indeed be pleasing in His sight.