How do you get your idea to the raid leader?
While often times it'll depend on what type of raiding culture your guild has, there's a few basic rules to follow.
First, never blurt a strategy out during the middle of a fight. If your guild is cool about talking out strategies over vent during raids, wait until the wipe is over to mention something. A lot of other folks are usually busy with things, even if you're dead (well, perhaps they're not busy enough!)