There's an article on the BBC website today about talking to strangers - whether or not people consider it polite, are willing to strike up a conversation and if the weather is the best subject to start on.
Often I read the comments section at the bottom of BBC articles. I really liked this one...
'The other day someone gave me a helium balloon shaped like a panda, and I had to take it across London. If you want people to talk to you, take a panda! I simply couldn't believe how many people (guys, girls, groups, couples, individuals, young, old) stopped to talk to me, to ask the panda's name, to ask if he was dangerous, what he ate... In a city where usually no one speaks to anyone, an anthropomorphic balloon is an instant bond with - apparently - everyone!'
So now you know what to do if you're bored and have no one to talk to!