Tumblr really wants to make it easy for users to regularly update their blogs. So you can even update yours via an e-mail from your computer or smartphone. This is perfect if you're just hopping online quickly to check e-mail, but don't want to open your browser and go to the site -- which is often the case when you're traveling. To post a message, photo, audio or video clip, all you need to do is e-mail it to a secret address created especially for you by Tumblr. To find it, click on your blog name from the Dashboard, then Blog Settings in the right-hand column. The e-mail address is listed in the Post by E-mail line. While you can leave the Subject line of your e-mail empty, you can also use it as the headline for a text entry, or as the caption for a photo, video or audio clip [source: Tumblr].