Lufthansa are currently offering 300 free Miles&More points if you try out their new M&M Facebook app. The link to sign up is here.
It’s a very simple process – just log in with your Facebook account and add your M&M log-in details when prompted.
The purists will note that I did resist the temptation to call these miles “free”, as people have understandably pointed out in the past that something’s not actually “free” if you have to put some effort into obtaining it. However, this really does take 30 seconds!