Many times you find yourself in a predicament, when you know the easiest way to get a file is to use Dropbox, but explaining about Dropbox will just take too long. Or maybe you need to get something into my Dropbox and I just don’t have access to it right now. For these scenarios, some nice people invented services we can use to send files directly to our Dropbox, without using Dropbox.
http://www.makeuseof.com/tag/5-ways-send-files-dropbox-dropbox/