Jason Fried has some great advice on how to get into the zone:

Getting in the zone takes time. And that’s why interruption is your enemy. It’s like rem sleep – you don’t just go to rem sleep, you go to sleep first and you make your way to rem. Any interruptions force you to start over. rem is where the real sleep magic happens. The alone time zone is where the real development magic happens.

One tip to help you create some alone time is… Set up a rule at work: Make half the day alone time. From 10am-2pm, no one can talk to one another (except during lunch). Or make the first or the last half of the day the alone time period. Just make sure this period is contiguous in order to avoid productivity-killing interruptions.

How much more work would your business get done if you set aside “zone” time.