Confusion of affect and effect makes me crazy.

And, I cringe when the weather person calls for "a mix of snow and rain". No, I don't cringe - I shout "MIXTURE!" at the radio, and the kids roll their eyes at me.

Another one that gets me riled is whether versus wether.

Oh crap, now they are tumbling out...

aerial vs. areal
nauseous vs. nauseated
stationary vs. stationery

aaaggggghhhhh!

Must stop now.