Face to Face
The ratio of words spoken to words typed in business communication has forever changed. When it comes to work, the preferred and more "efficient" form of communication is email/text/messaging app over a phone call or in-person meeting.
While video chat and instant lines of connection make it easy to communicate quickly over long distances, there is still an unseen element when people physically come together in a room. We're not all psychologists, but we can see a person's micro expressions, hear their laugh just feet away from our ears, see their concern after the last suggestion; the room is alive with energy.
Good ideas can come from anywhere, but great ideas come from collaboration. Don't forsake the assembling of your employees. Pull people together, not just via email, but by bringing them physically close. You will develop comraderie, connection, and cultivate great ideas.