The first and most important step towards being more impactful in your communication is to become aware of your credibility robbers. The fastest way to find out if credibility robbers are causing you trouble, is to use recordings of yourself in meetings. 

To get the most amount of observational feedback from you 90 second video, watch it a number of times. Especially observe the first seven seconds both with and without sound. 

1. Observe: 

• Pauses (non words). 
• Resting hands (truth and trust plane/steeple). Gestures (Palm flash/ palms down).
• Eye contact (everyone for 2 seconds). 
• Stance - Face (Smiles & eyebrows up). Feet (both planted and pointing to the audience). Posture (hight and space). Head (balanced).  

2. Once you have observed yourself, pick something to "dial up" in each interaction over the next week. 

3. At the end of the week, pick an internal (safe) meeting and ask a colleague to video you for 90 seconds using your mobile device. This can be done discreetly. 

4. Watch the video and score yourself 1-5 for the non verbal you wanted to improve. 

5. Rinse and repeat.