Q: I feel compelled to check my work email and cell phone, even at night. How can I "unplug" and take a break?A: It sounds like you've already taken the first step: deciding that a 24/7 work schedule isn't for you. For those of you who aren't there yet, take a moment to consider how you—and your family—really feel when your BlackBerry beeps during dinner. Is your immediate reaction to answer it, or do you secretly wish you could toss it down the garbage disposal? Do your kids have to start an argument just to get your attention? Many working mothers believe that the only way to maintain authority and respect at the office is to be on call all the time. While a few businesses do expect this, most simply want employees to put in an honest day's work and reasonable overtime. Working through your kids' Saturday Little League games and sending 2:00 a.m. emails won't help you get ahead. In fact, it may give the impression that you're overwhelmed, which could keep you from garnering top assignments. To turn things around, devise a schedule that accommodates personal and workplace obligations. You may choose, for example, to write reports on the nights your mother-in-law is watching the kids and dedicate other evenings to family time. Or you may opt to spend two hours a night with your family, then work for an hour before bed. Whatever you do, don't be vague about postwork time: It only blurs your boundaries. The next step is to let your boss and colleagues know what to expect from you—and when. And be firm! If you say, "I'll check email on Wednesday nights only," don't do it on Fridays. If you work from home, list your hours on your voicemail and email so clients don't assume you're always on call. And if you must return messages, only answer the urgent ones. If anyone presses, say, "Let's wait until morning." Being honest will help you earn support.Be sure to talk to your partner and kids about your desire to limit after-hours work. Chances are, comments like "Did you see that goal I kicked? I'm so glad you weren't on the phone" will give you all the reinforcement you need.    Takeaway Tips