Where are you your most productive? I feel I get in my best flow in a public place with wifi and some headphones. That mix of background chatter and lack of interruption really does the trick. It seems like research backs me up on this. So the nice little trick I've been using these days is a website called Coffitivity. It simply simulates noise from a coffee shop. Pair this with music just slightly higher in volume and you are good to go!
(written with Coffitivity and Pandora in the background ;-)