Final answer:
After two v2v (voice-to-voice) conversations, it's advisable to send a follow-up email to document the discussion and clarify any action items.
Step-by-step explanation:
A good Rule of Thumb is that after two conversations on a program, send a follow-up email. This practice helps maintain clear communication and ensures that any important points discussed during the voice-to-voice (v2v) conversations are documented and can be referred to later. Such a follow-up email allows for clarification of any issues, action items to be listed, and provides a written record that can be useful for both parties to track progress or reference in future interactions.