Help people feel comfortable and energized while getting to know each other in ways that can enhance all future collaboration.
Icebreakers and warmups are commonly used during the first stages of team development (e.g., at the introductory meeting or class) or preceding a group gathering). Also try them whenever people need re-charging, or when bringing in new members.
Isn't this winter a prime time to break the ice and warm up together?
You might also be interested in Icebreakers for Online Team Building.