WORDS OFTEN MISSPELLED
accidentally advice affect beginning believe benefit challenge criticize deceive definite describe despise develop disappoint duel ecstasy effect existence fiery formerly humorous hypocrisy immediately incidentally latter led lose marriage mischief murmur necessary occurred parallel Philip playwright preceding prejudice principal privilege pursue repetition rhyme rhythm ridiculous sacrilegious seize separate shepherd siege similar simile too tragedy tries undoubtedly until Write to-day, to-night, to-morrow (but not together) with hyphen. {noders note: you don't have to do this anymore.}
Write any one, every one, some one, some time (except the sense of formerly) as two words.
The End of The Elements of Style