The use of an actor's hands can tell an audience a great deal about the character and the situation. So, it's helpful to learn about gesture, which is about using the hands to express feelings. The wringing of hands, the clenching of fists, putting your hands on your hips, even letting them hang loosely at your sides, or thrusting them into your pockets all tell the audience something about who you are as a character and what you are experiencing. The best advice again comes from Shakespeare as he reminds us, "Suit the action to the word, the word to the action."
Try this exercise with a memorized speech or monologue:
ACTIVITY: NON-VERBAL ORAL INTERPRETATION
Take one of your memorized speeches and communicate it without speaking any words, using only gestures to get all the nuances therein. This is not a game of charades: You are to use gestures to express the complete feeling and meaning of words, not to pantomime syllables therein. Make the gestures as big and exaggerated as possible at first, using the entire body to communicate meaning and feeling.
After you have done that, speak the speech aloud, keeping the same sized gestures you just used but just adding the words this time. Gradually, with repetition, the gestures will dwindle down to those essential to effectively communicate the meaning. Your gestures will be natural, organic and communicative.