Mail is a powerful tool which works on any type of device.
You can also start a Hangout Chat or meeting from inside it.
This short video gives an overview of the Gmail interface.
A smarter way to view your inbox...
Priority inbox gives you a much more efficient way to view your inbox.
It splits your inbox into three sections: 'Important and unread,' 'Starred,' and 'Everything else.'
Emails from people you correspond with will be marked important and unread, everything else goes below (eg. advertising, etc.).
You can train it by clicking the importance marker next to the title of an email.
This short video gives an overview of how conversation view works.
You can turn conversation view off inside Gmail Settings > General
It is easy to get your mail, contacts and calendars on any type of mobile device. Follow these links for information:
Gmail has a great list of keyboard shortcuts for your use - common ones include:
c = compose
r = reply
f = forward
a = reply all
Cmd (or Cntrl on Windows)+ Enter = send
Shift+? = show all shortcuts (good luck if you can remember them all!)
For a full list of these and how to enable them, check this article on learningarchitects.com