This is the most dangerous post I've ever written. Why? Because I'm about to tell you things that absolutely drive me insane. Mostly, it involves email etiquette and writing style.
First off, I am not your manager. Do not write to me in business slang. Example: My schedule won't support that activity.
Replace with: I'm busy.
Example: In addition to providing visibility and access to our organization and key business areas, the site includes several new communication tools designed to inform, enable, and engage employees.
Replace with: We made a new site. Its pretty cool... check it out.

Second, make sure you don't overdo your punctuation. A single exclamation point can usually convey how excited you are. I don't need a string of 10 exclamation points to know it.
Example: We're going to lunch at Cucina Cucina!! You're totally invited!!!!! It's going to be super yummy!!!!!!!!
Replace with: You want to go to lunch at Cucina Cucina?

Third, people who reply-to-all... watch yourself. I don't mind getting 3 or 4 emails sent to me unnecessarily... but sometimes it can get crazy. I'm just asking you to be a little more mindful when using <ctrl>-<shift>-r (yes, that's the hotkey combination for reply-to-all).

The fourth way to drive me insane: be the second or third person who replies-to-all to say: "quit replying-to-all."

Those are the big ones. I know I'm going to get about 1000 emails tomorrow with all 4 of these annoyances in them... but whatever. I feel better after getting that off my chest.

Side note:
Seattle Mind Camp 3.0 is on! I already bought my ticket. You in?