Some points are bad advice
I admit I love email. I send a lot of emails and I receive a lot of emails. So a few points mentioned have some significant drawbacks.
"We all know people who send an email when a phone call is more appropriate." - The problem here is that the other person has to be where the phone is and has to be able to take the call. Phone calls are disruptive because they demand immediate action unless you only get voice mail. Then you are no better off than with email. Plus, email is a written record while a phone call usually has no record. A week later neither you nor the person you called has any recollection of what was asked and decided. Email can also be searched quite efficiently, not so with voice recordings or personal conversations.
"Short and sweet gets read." - ...and misunderstood. While being concise has its merits it often lacks detail and information needed. The leads to long email threads or email/phone/in person conversations that others on the email thread do not know about. That then requires sending another email to everyone summarizing everything and finally adding all that info that should have been added in the first message instead of a handful of bullet points. Most people can read fast.
"When you CC everybody and their brother, you annoy them, unless there is a clear call to action for everyone." - You got that wrong. Anyone who is CCed gets that message as info only, there is no need for action and no expectation that they read it. The To line of addresses is the important one with the first name being the one to act. That is a well established convention in the business world.
The advice that is missing is this: "Email applications have filters. Use them!" It takes a bit of time to set up filters and tune them. I get hundreds of emails a day and depending on the origin several of them go straight to the trash folder. A few times per day I skim over the emails in the trash folder to pick out anything that might be of interest, but I usually delete all of it. Other folders are fed through filters and that makes it easier to decide what to read and respond to first.
Also missing: "Email applications can save drafts. Use that feature!" This will force you to revisit a message, tone it down, remove things that already got cleared up, or throw the entire draft away. I received that advice from a top level manager once after replying to one of his emails in a way I should not have. Luckily, he was a good sport and saw this as an excellent mentoring opportunity.
Further tips: Leave emails to respond to in the default inbox folder and keep that number as small as possible. The luxury of not having to answer right away does not mean you can wait a week to reply.
Send yourself emails for items to do that are not captured in other places. If you find that there are emails from yourself from a week ago then throw them away because it probably was not an important task.
Throw your phones away, you do not need them (OK, maybe a bit too extreme). Phone calls are annoying because they always come at the worst time. I find phone calls obnoxious because they always imply that I have to reply to an inquiry right now. Rather bold to assume by the caller that I have nothing better to do at the moment. Phone is also more expensive than email to operate and your email application typically has a way better address book function.