Bring and Take

"Bring" is normally a request to another person to transport an object,
which may currently be located anywhere else, to where "I" am now.

"I" can never "bring", "I" always "take".

Amendment courtesy of dxm.
"I" can "bring" an object (which currently may be located anywhere
except where I am right now) to where you are now, eg I say to you
over the phone "I will bring a loaf of bread home with me tonight".

"You" can sometimes "bring" it, but only to where I am right now,
otherwise "you" would "take" it to some other place.