"Pre" - as in pre-book, pre-order, pre-planning.....if you book something or order something or plan something then that is in advance, so "pre", meaning before, doesn't add anything.
What pre-order should be is pre-release order, as in ordering before the item has been released.
And one that is American - "I could care less" instead of "I couldn't care less", sorry but if you could care less that suggests there is a level of caring that is less than what you care right now!