Listen to what people say

It is interesting listening to what people say-- and I catch myself saying, what the heck?  I understand there are colloquialisms but when an idiom is used incorrectly my brain re-sets and then I wonder have I been saying that wrong all along?
I was standing in line at a shop and the customer in front of me was disagreeing with the cashier and finally said, "well, it's a mute point- you don't understand what I am asking".  It's not a MUTE point (mute means unable to speak).  It's a moot point.  There are several that make me crazy--
(1)  head towards the door and then...  TOWARD never has an s on the end.  And while we are on the s at the end of a word-- ANYWAY also has no s ever.
(2)  Is it should of or should have-- it's should have.  Always.  And it's would have, could have as well.
(3)  While your stomach may be cramping because you didn't eat enough, you have hunger pangs, not pains!
(4)  Literally has become quite a popular word recently.  Please don't overuse it.  If it's a fact, I believe you and you don't have to convince me, literally.
(5)  Trying to get control of something by nipping it in the butt just won't happen.  You nip it in the bud as if you are preventing a flower from budding.
I don't always catch myself but I am working on it.  It probably doesn't matter to anyone but me but I am a bit embarrassed when I realize I am saying something incorrectly.  When on our cruise last year I realized it was MUSTER station--granted, not something you have to do often in life but it's not a hot dog stand where we all mustered together!  All of a sudden, (correct not all of the sudden) I keep thinking of more and I have to look up to see which are correct.
I believe we should learn something every day- whether it's about the world around you, a life hack to make things better or correct grammar, learning is a life long process and I am still in that process.  It's a dog eat dog world out there (not a doggy dog world) so, listen up!