If you have the emotion, it infects you and the audience. If you don't have it don't bother; just say your lines as truthfully as you are capable of doing. You can't fake emotion.
Coming from having absolutely nothing to having a few grand in the bank, it was a big culture leap. I think that's why I went off the rails a bit really, 'cause there was no training for it. They didn't do fame in schools.