Technical terms...
 

BRAKE == (1) a device for slowing or stopping a vehicle or other moving mechanism by the absorption or transfer of the energy of momentum, usually by means of friction (2) anything that has a slowing or stopping effect.

BREAK == (1) to smash, split, or divide into parts violently; reduce to pieces or fragments (2) to destroy or interrupt the regularity, uniformity, continuity, or arrangement of; interrupt

how about idle vs. idol (no joke - there is a post titled idol on the tech board right now)

Looser. Loser.

That one always makes me smile: "You are such a looser".

Raise vs Raze. That really tripped a up kid I knew. What a maroon.

Their, there, they're.

should have. not should of.

Best,
Tom

On the boards that I frequent, I think brake and break are the most common.

Not as common, but loose, lose, and loss.

affect / effect

Exotic / 928

layed / laid

Now that's funny!

1(+-)

On CL I see:

Trailor all the time instead of trailer. For some reason it bugs the S**T out of me.

Anything with apostrophe's.

See how I did that?

Dose vs Does...

One I see here a lot: (seriously, search on the word peddle here)

Pedal - the device you press on to activate said brake.
Peddle - Selling said device door to door.

Incidentally these are the only two words in the English language that are both homonyms and antonyms.

There is no word that rhymes with "orange" either.

I'm full of useless information, as anyone who's been around here a while can attest to.

Watt ewe guise tulking baud?

Irregardless. Orientate.

Yes, I know they are both 'legit'. Regardless and orient are fine.

Phase/faze

Its, It's