First of all, happy new year! Sadly it seems that economically 2013 will still be harder than 2012. If you live in London, even if you visit, it's likely that you fall in love with the classic design of the propaganda poster you can see below, designed by the British government in 1939. It's everywhere and I think it's the best motto for 2013.
If you are interested in the story of this propaganda poster, I recommend that you watch this video, it's only three minutes long and it's very illustrative.