Create opportunities for making gestures during a speech by using phrases such as "On the one hand ... on the other hand," and by numbering your points.
Begin speaking with your hands together. As you speak, your hands will naturally separate and come together again.
Assess the space you'll be speaking in and the size of the audience you'll be addressing. For smaller venues, gesture with the hand and forearm by bending at the wrist and elbow. For larger audiences, gesture with your entire arm by bending at the shoulder.
Keep your hands above your elbows as much as possible to express authority.
Make bold gestures, such as using a fist instead of a finger, when appropriate.