E-mail communications is not plain text anymore and people want to send/receive well-designed email messages. There are many paid services that allow you to create a visually appealing e-mail template, but you can create it yourself using only Outlook.
If you frequently sign your messages using not only by your name, but also add an extra information such as your job title and contact information, you'll appreciate Outlook's Signature feature. Also, you can add to the signatures icons with links to your profiles or personal pages in Facebook, Twitter, or other social media sites.
Outlook can display either the number of unread e-mails or the total number of e-mails in a folder alongside the folder name.
This option controls which address book you see when you open the Address Book (via clicking Ctrl+Shift+B) and when you click the To, Cc, or Bcc buttons when composing e-mails.
Even if you are not an Exchange user, you can send a copy of your calendar in an email message so people will know when you are available.
This tip shows how to open the Calendar sent to you.
There are several Outlook startup switches. The most common switches are listed in this tip.
This tip shows how to create and add custom holidays, for example, of your company to the Outlook calendar.