My 2 cents -
Your -- (owning)
You're -- (you are, subject and verb, contraction)
You're welcome not your welcome.
Verses -- as in songs or poems
Versus -- as in one versus another
their -- belonging to someone ("heir" to remind you of possession)
there -- a place ("here" to remind you of a place)
they're -- they are
who's -- as in who is or who has
whose -- the possesive form -- EX: Whose mess is this?
it's -- it is or it has
its -- EX: The car, its motor . . . -- if you can substitute "his" (his motor) for its and it makes sense, then it is the correct form.