Watch lots of movies and learn from actors. Practice different emotions. You have to be able to make characters and not be yourself. Imagine yourself as a swan and walk like a lovely swan and talk like it.
You have to escape yourself and be someone else. Now practice acting like your uncle Joe who smokes and drinks. What will he do and just do what you think he would do.Wear the appropriate wardrobe to get into the mood. You can always practice with a friend or with a mentor and they will show you what you’re doing wrong. When it comes to acting, emotions and getting into characters are important. Take as much acting lesson as you can. Watch a lot of films so you can become familiar with their styles.