As co-founder of Hotwire.com and CEO of Zillow for the last seven years, 39-year-old Spencer Rascoff fits most people’s definition of success. As a father of three young children, Spencer is a busy guy at home and at work.

What’s the one thing that Spencer refuses to do on the weekend? Work—at least, in the traditional sense. Rascoff says:

“I never go into the office on weekends, but I do check e-mail at night. My weekends are an important time to unplug from the day-to-day and get a chance to think more deeply about my company and my industry. Weekends are a great chance to reflect and be more introspective about bigger issues.”

A new study from Stanford shows that Rascoff is on to something.

The study found that productivity per hour declines sharply when the workweek exceeds 50 hours, and productivity drops off so much after 55 hours that there’s no point in working any more. That’s right, people who work as much as 70 hours (or more) per week actually get the same amount done as people who work 55 hours.

Successful people know the importance of shifting gears on the weekend to relaxing and rejuvenating activities. Like Spencer, they use their weekends to create a better week ahead.

This is easier said than done, so here’s some help. The following list contains 10 things that successful people do to find balance on the weekend and to come into work at 110% on Monday morning.

1. They Disconnect

Disconnecting is the most important weekend strategy on this list, because if you can’t find a way to remove yourself electronically from your work Friday evening through Monday morning, then you’ve never really left work.

Making yourself available to your work 24/7 exposes you to a constant barrage of stressors that prevent you from refocusing and recharging. If taking the entire weekend off handling work e-mails and calls isn’t realistic, try designating specific times on Saturday and Sunday for checking e-mails and responding to voicemails. For example, check your messages on Saturday afternoon while your kids are getting a haircut and on Sunday evenings after dinner. Scheduling short blocks of time will alleviate stress without sacrificing availability.