The jury has been called the fourth branch of government.
"I consider trial by jury as the only anchor yet imagined by man, by which a government can be held to the principles of it's constitution." - Thomas Jefferson
"The jury...the heart and lungs of liberty." - John Adams
Voir Dire (Fr. 'to speak the truth'), jury selection - If you intend to serve, the less said, the better. Never mention jury nullification. Don't lie but don't say more than is necessary. Usually the judge and the prosecutor will not mention nullification. Follow their example.
"Runaway Jury" - Under no circumstances must a jury commit injustice. Jury nullification is a doctrine of mercy not anarchy.
Fully Informed Jury Association
http://www.fija.org/