Slack is the chat app that all the cool kids are using. Many teams have used Slack to successfully replace email in their organizations and manage their projects and documents all in this one tool.

You can check out the full Slack Cheatsheet here.

And below are a few shortcuts to get you started:

⌥ ↑ Previous channel or direct Message
⌥ ↓ Next channel or direct message
⌥ ⇧ ↑ Previous channel or direct message with unread messages
⌥ ⇧ ↓ Next channel or direct message with unread messages
⌘ . Toggle right pane
Mark all message in current channel or DM as read
⇧ ⎋ Mark all messages in all channels and DMs as read
⇧ ↩ Create a new line
⌘ ⇧ [ Switch to previous team
⌘ ⇧ ] Switch to next team