Emphasize written communication. Voice and Video are important but it's too easy to prioritize a Video Conference over written communication. The two mediums ar

Emphasize written communication. Voice and Video are important but it's too easy to prioritize a Video Conference over written communication. The two mediums are complementary not fungible. If you needed a meeting you probable also need a published summary of the meeting. This doesn't need to me only technical either. Humorous and/or fun writing is also helpful to build culture. Provide appropriate forums for it. Moderate your informal written communication though. Ensure it's appropriate for the culture you are trying to maintain. In person events periodically at least once a year but more frequent if you can swing it. They are important to help people put faces to names and that helps you teams develop empathy for the other person.