Tony Jones on "How To Take Communion."
In the comments I concur with reading John Mark Hicks' book Come to the Table: Revisioning the Lord's Supper (as I've mentioned before), and also propose asking these questions:
1. Is the body (σωμα - sôma) that is not discerned (διακρινω - diakrinô) by the careless or callous communicant the bread that is being eaten, or the assembled fellow believers?
2. Is the "remembrance/memorial" (αναμνησις - anamnêsis), as well as the "proclaiming" (καταγγελλω - kataggellô) of the Lord's death, something the assembled are to do with respect to themselves and each other, or to God on Jesus' behalf?
3. Is the Lord's Table a covenant meal between the Lord and those who are His, or a continuation of Jesus' table meals with sinners and tax collectors and whosoever will come?