Hands Alive means to use your hands to give speakers or viewers hand signals to give them information. It's a non-verbal way of communicating.
Being remote means never having water cooler moments. The moments where you chat with your colleagues. I've coined a phrase -Take Five to Socialize - that describes how I build social moments into my virtual interactions with colleagues and customers. I'm not sure how that this qualifies as an actual technique but let me tell you about it!