Kill Instant Messaging
With a little bit of software help (mailing-lists, filters, etc.) all email communication can well-targeted, persistent and searchable. I would use persistent, searchable mailing-list for team communication, and possibly other software and services to get as much as possible from strengths of email. Some conscious effort would be put into helping everyone efficiently manage email (filter rules, etc) and building a culture of efficient communication via emails.
Source: dpc.pw