For an entrepreneur working with a virtual team to run a small business, communication is the single most important factor determining whether things run smoothly. It is absolutely critical to be able to communicate with your team members in an instant as things come up during the course of a work day. When there is seamless communication between your team members, you can set a more productive pace and get more accomplished. Email and phone calls have their uses, but for instantaneous communication, there is a popular new tool, called Slack. Slack is a platform for team communication that can be…