The message of the Lord's supper is one of SELF-EXAMINATION for the Christian. God doesn't want you to partake of the elements in the Lord's supper as if you are eating a normal meal. He wants you to me sober and praying to make sure everything is right between you and Him.
The main thing to remember is that this is a time for REMEMBRANCE .
1 Corinthians 11:23-26 (King James Version)
For I have received of the Lord that which also I delivered unto you, that the Lord Jesus the same night in which he was betrayed took bread:
And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.