There/Their/They're not flying to Alabama today.
They're
Believe/Beleive it or not, I love you.
Believe
My grandma loves writing on scented stationary/stationery.
stationery
This is passed/past its due date.
past
All together/Altogether now, "It was an all together/altogether great presentation!"
All together now, "It was an altogether great presentation!"
Is this your/you're luggage?
Your
You can not/cannot do any better!
cannot
My cousin's dying to see the Sahara desert/dessert.
desert
Can we please discuss this farther/further?
further
Every day/Everyday I go to school, I correct every day/everyday writing mistakes.
Every day I go to school, I correct everyday writing mistakes.
He wants an aisle seat to/two/too.
Too
Don't tear the twins a part/apart!
apart
My dad's pants are too loose/lose on him now.
loose
Is this worth more than/then that?
than
It's a compliment/complement whenever you compliment/complement my research with your results.
It's a compliment whenever you complement my research with your results.
We don't accept/except that credit card here.
Accept
They're married all ready/already?
already
My aunt lost her breath/breathe!
breath
Whichever/Whatever you decide to do, I'll support you.
Whatever
Are you conscious/conscience of your conscious/conscience working overtime?
Are you conscious of your conscience working overtime?
This is going to have a negative affect/effect on your travel time.
Effect
We spend allot/alot/a lot of time together.
a lot
My brother's the principal/principle at this school.
principal
Find people who/that think the same way.
who
Please advise your client to get good advice.