When composing a message in Microsoft Outlook there is an easy way to insert an email address in the to, cc or bc bar.
Simply start writing a couple of letters of the email address or name of someone in your address book and then if it does not show up as a quick option just hold down Ctrl and press K and then all of the options of names with that letter (s) will show up and you just have to click on the email address you want!
Simple hey?