Grammar, Dammit. If anyone, anywhere, anytime has told you "It's not i-t-'-s, it's i-t-s, i-d-i-o-t," then take a week and try this:
Don't type "it's." At all. For a week. Did you ever do that experiment in grade school where you try to go an entire day without dotting your is, js, or crossing your ts? Same thing. Don't type "it's." At all. Ever. Don't write it. Don't even think it.
If "its" just feels wrong, then write out "it is."
"Its going to be a beautiful day. Its not me, its you. When we were at the zoo, the bear was doing something naughty to its privates." "It is going to be a beautiful day..."
After that week, if you've been playing faithfully, go back to what you were doing. You can use "it's" again...as a contraction for "it is."
I can put up with a lot of crap; I can write a lot of crap.
STOP MAKING ME FACE "THE DOG TOOK IT'S FACE OUT OF IT'S WATER DISH AND SPLATTERED ME WITH A MIXTURE OF IT'S TEPID BEVERAGE AND SPIT."