Dale Meador has an excellent article at RazorMouth.com on worship. Check it out. A quote:

How often have I approached the Lord with a weary, lazy or distracted heart.I see this on Sunday mornings. One special day among seven, Sunday is the day that I am blessed to worship the Lord shoulder to shoulder with the brothers and sisters who comprise the body of Christ of which I am blessed to be part. Typically, we gather to worship the Lord in song, sacrament, and teaching. At the outset, we often are privileged to enjoy the gifts of saints uniquely gifted in music that is uniquely crafted to recall God’s attributes and glorify him accordingly.

And there I am, sprawled on the pavement. Yawning, distracted, oblivious. “I wonder when he got that new guitar?” “Shouldn’t we be standing up for this?” “Did I turn off the iron?”

How easily distracted we are from He who should ‘distract’ us.