Hey DP, I have opened my new website HH.GD and need ways how to promote Short URL Service or get more build more links.
Use Google's keyword tool at: https://adwords.google.com/select/KeywordToolExternal to find variations of the keyword Short URL, then get backlinks with the anchor text of the keyword you are going to target such as: free short url
Use twitter (twhirl) and offer your service to there. Asking twitter maybe hard, but twhirl can be easier. Or just ask any twitter software or plugin providers. They are hungry to make the URL shorter.