When I did research on Uta Hagen one of the things I learned was that she believed that you need to know so much about you character that you could be like him for a day. I used the questions on Merctio to better understand him more.  And as a result of that when we acted out the play for the first time not just reading through it, I knew what emotions to portray and when to show them.  Also I used a tequinque from the father of acting witch was when you need to portray a certain  emotion you need to think of something that will get you feeling that way, because if you think it then your body will actually do what you need to do.