It took us four years to grow from an ambitious idea to a profitable business, with a small team and not a lot of resources. I'll tell you how making "just enough" and "good enough", with a fine mix of various best practices, a lot motivation and some Ruby, we've managed to build a fast-growing product and a happy company.
The video is available on YouTube : http://www.youtube.com/watch?v=F8hH_5LKrQY
A french version is available : https://speakerdeck.com/jlecour/dune-feuille-blanche-a-une-affaire-rentable