Elder Dallin H. Oaks of the Quorum of the Twelve Apostles shares some of his thoughts on this subject.
How should I behave in sacrament meeting?09265_000_011
We are seated well before the meeting begins.
Sacrament meeting is not a time for whispered conversations on cell phones or for texting.
During sacrament meeting—and especially during the sacrament service—we should concentrate on worship and refrain from all other activities.
How wonderful when every person in attendance joins in the worship of singing—especially in the hymn that helps us prepare to partake of the sacrament.
Illustrations by Elise Black