Rein/reign--One does not take the "reigns" of a situation, unless one is engaged in a coup d'etat. The things used to control a horse are reins. No "g". Seriously. Just stop adding that "g" and we'll all get along just fine.
Principle/principal: Principles are those things you live by--the points on your moral compass. Principal is the guy at your high school who busted you for smoking. Principal is also the main/first/most important thing. An easy way to think of it is that the "principal" at school is the most important staff member. (And one hopes he or she has principles.)
Could of/should of/would of--NO. Just fucking NO. It's "have". Or, in contraction form, could've/should've/would've.
My biggest, biggest, biggest annoyance right now is "could care less". Think about that for a moment. If you could care less, that would imply that you care at least a little bit, There is room there, a possibility for caring less. It's couldn't care less. As in, there is no possibility for fewer fucks to be given.
I leave you now with Mr. "Weird Al" Yankovic saying in song all the things I want to say:
My biggest, biggest, biggest annoyance right now is "could care less". Think about that for a moment. If you could care less, that would imply that you care at least a little bit, There is room there, a possibility for caring less. It's couldn't care less. As in, there is no possibility for fewer fucks to be given.
I leave you now with Mr. "Weird Al" Yankovic saying in song all the things I want to say: