There are few things more annoying than getting a long and wordy e-mail message that really only says one thing that could have been said in a small fraction of the words. That´s why this short and simple tip sticks out so much as a great idea. The author advocates the use of subject-only e-mails. As you will see in the example, you could send a message with a couple of paragraphs explaining that you are going away on vacation, that you will be back in two weeks, and that you will be available again as soon as you get back, or you could deal with the same basic information in the subject line. Simply putting in the subject line of an e-mail "Going on vacation, back in two weeks [END]" gives people the same information as the longer message and it doesn´t take nearly as much time to read.
Sure, it isn´t as polite or friendly as the longer e-mail, but for a good portion of the people you would send such an e-mail to it doesn´t really matter. They get the information they need from you and they can fill in the rest of the information for themselves. They know you will be available when you get back and they probably don´t care where you are going. You are saving themselves time and, as importantly, you are saving the recipient time. People will appreciate that in the long run, probably much more than they would appreciate the message.
There´s another possibility — you might not need to send an "I´m going away´ message to many people at all. I marvel at the number of times I get such a message from a person and wonder why I would care because I would almost certainly not have e-mailed them in the time they are gone anyway, and even if I did I probably wouldn´t have noticed, or cared, if the reply was delayed. Thinking about who you are sending this kind of message (or any kind, for that matter) can save you and others time and frustration.