I started out by merely tweeting a link to the site and asking my friends to do the same. I did publish HN but it got took down pretty sharpish.

My main win was cold-emailing tech blogs. I got featured on BoingBoing - http://boingboing.net/2013/08/12/stickonspy-sticker-reminder... - through emailing and also managed to sell directly to Cory ;).