Answer: Rather than trying to create the emotions on your face, work on feeling the emotions. Pick something that makes you feel a certain way (scared) and try to really feel that way.
Here is a great monologue with a variety of emotions: http://www.freedrama.net/breakheart.html
Try to think of times in your own life where you have felt like the character and then remember these emotions while doing the monologue. Record yourself and forget about the camera while you do it. Focus on the emotions and really feeling them.
More acting tips: http://www.freedrama.net/acting.html