The best preparation for acting is life - observing life and people and observing yourself. All that becomes your library. So when you have to research a part, a scene or an emotion, you go into the library and get what you need.
All through my life, I was hated on. When I was in middle school, they used to write in my rhyme book, 'You suck' or 'This sucks.'
Life - and I don't suppose I'm the first to make this comparison - is a disease: sexually transmitted, and invariably fatal.