I agree with everything above:
Ignore the line-jumping or forgive it. Everyone in my church "line-jumps"; we just don't care whether or not someone gets there first. At that particular point in the service, it doesn't matter. Do you really want to be angry when you take the eucharist? I don't think so.
Take up the issue of dress code with the priest, and let him handle it. Then forget about it.
Forgive someone if their phone goes off accidentally...
Confront any idiot yakking or actively using technology in church. If you're reticent, stare pointedly at them. If you're bold, ask them to please be quiet, or shut it off, or leave. You have the right to do this because it is your prayer time. If someone doesn't take being in church seriously, they do not belong in church, and it's as well that they leave.
Why am I confrontational--and totally non-Orthodox--on this issue? Because if we don't take a stand and insist that our church is a sacred place, then it soon won't be.
Besides, maintaining the sacredness breeds the right attitude, and is what most serious Christians are looking for. Here, I've got an anecdote: The first time my friend attended our church, the priest ordered him to take off his hat. My friend knew immediately that he was in the right place and has attended ever since.