Recognize this problem? Your headphone cord runs right over your keyboard. GREAT DESIGN Apple.
There is hope for you, however!
All you need are some scissors (not sizzurp), some tape (the stronger the better)
And one of these, which is a 6 foot 3.5 mm Male/Female audio extension cable.
Run the cable under your desk and tape it up like so.
Voila, your life is better.