If you find yourself typing the same email message over and over again in gmail, you should look into Canned Responses. I use them to inform people of my many addresses in great detail. I have canned responses to show students some common processes (how to write a blog post, for example) or ways to improve their English (how to schedule your English Central study). You can even make a kind of rubric to answer student requests for feedback.
To set up Canned Responses you have to be signed into Gmail, then go to Settings and Google Labs. Labs are small experimental software add-ons, or extensions, to Gmail. Canned Response has been around for years, so is not all that experimental anymore.
Once you click on the link above, you will see all of the possible Lab features you can add to Gmail. Search for Canned responses. Once you find Canned Responses, you can Enable it by clicking on the radio button. Now you should be able to compose a message. Write the message, you should highlight the text you want to save and use again and again. In your Message window , you will use that small menu at the bottom right corner. Once you save your Canned responses you can use them at any point in another email. For example, I might be emailing someone about meeting me at school.
I have Canned Directions to my station, from my station to my school, and from the gate to my office. I have canned responses to publishers enquiring about textbooks. All these Canned Responses are multilingual. I hope that spending a few minutes making canned responses will allow you to save lots of time later.