Something that drives me nuts are the redundant phrases mindlessly repeated by some members of the Church. To say something without really thinking about what you're saying just because you're looking for filler words to finish a talk or a prayer. Not saying I haven't been guilty of this myself when I was a kid. But I'm not making this up. This is a problem in the Church for members of all ages.
How often do we hear people praying to God asking for our safe return home. How many car accidents are we getting into these days where every single prayer has to be lined with the phrase "please bless us that we may safely make it home"? Car accidents among Mormons would appear to be an epidemic to an outside observer.
Or how many testimony meetings have we been to where we hear the phrase "I know this Church is true"? Members will often recite this without substantiating the reason as to why they believe the Church is true. This is sadly an often missed opportunity to share how we personally discovered the truths of the gospel.
I'm pleading to fellow members to avoid speaking in these redundant patterns, and to please just put a little more thought into what you say. Speaking from the heart is so much more meaningful and enjoyable to listen to.