While not dealing with the issue of weekly communion, this reminder by Douglas Wilson to Let the Word Apply It to the Wound is important to keep it from becoming mere ritual:
The Word that accompanies the sacrament here is a Word that should be spoken to the occasion, to the circumstance. The bread and wine are constant; we have no authority to substitute other elements. We have no authority to adjust the sacrament itself.
But do we speak words of warning or words of comfort? Do we fence the Table, keeping some away, or do we seek to gather up the reluctant?
This depends entirely on whether we are observing the service in Thyatira, or Pergamum, or Ephesus, or Laodicea. The Word is what applies the sacramental service as it ought to be applied. To simply go through motions involving bread and wine is to invite a covenantal disaster. This is a meal with our Lord; it is not a liturgical drill.