Top 10 Most Commonly Confused Words in English: Homophones!

Don't let these confusing words torpedo your writing. Below are the top 10 most commonly confused word pairs (homophones) in English.
accept/except
affect/effect
your/you're
its/it's
to, two, too
than/then
their/there/they're
quit/quiet/quite
whether/weather
principle/principal