In many of my Basic PC and LinkedIn classes we often talk about adding signatures to your emails. They can include your contact information or links to your online networks. They are simple to create and make a difference in making your email stand out from the rest. Here is a quick tutorial on how to add a new signature in Gmail.
For users who do not have an email signature you will place the radio button next to the email address you wish to create a signature for.
Note: Gmail can check multiple email addresses and many users use it to check all of theirs in one location. For more on that see this post.
Enter the text of your signature. Some examples would be your full name, telephone number, a link to your LinkedIn profile or in the case of my signature above a link to your About.me profile.
Chose whether you wish to place your signature above the quoted text of a reply by checking the checkbox. If you leave this unchecked your signature will only be placed at the very bottom of the email trail.