I've literally improved my concentration at work in the past 2 weeks. Started travelling to a wifi cafe 25mins away by subway. I listen to post-rock music while coming and going on good headphones. The bass and thumping guitar grooves clear my head. The deadline to get out of the house and clear demarcation make it easier to get into the flow zone. I get more work done in 4 hours than I used to get done lounging around my house in 8.