" How This Bad Habit Hurts Your Productivity Yielding to others’ demands for your time and attention lessens your productivity in five ways. First, it disrupts your work flow. You lose whatever momentum you managed to build through focused attention. Without distractions, that momentum helps you to complete tasks in less time. Second, it allows other people to dictate how you spend your time. You’re never in charge of your day, which means you can’t accurately plan it. Indeed, any plans you make are little more than wishes, or best-case scenarios. Third, saying “yes” gives you less time to address your own responsibilities. That can be disastrous if you’re working under an impending deadline. The people you help benefit by completing their tasks, but your own tasks remain unfinished. You may even be forced to work overtime to meet your responsibilities (see Day 7 for more on this bad habit). Fourth, it reduces the quality of your work. After spending considerable time helping others meet their responsibilities, you may be forced to rush through your own in order to finish them under deadline. The more you rush, the greater the likelihood you’ll make mistakes. While one or two mistakes are unlikely to cause a major problem, work littered with them will. Fifth, you risk suffering from burnout. Continuously relenting to others’ demands increases your stress levels. Deadlines loom and your work piles up as you spend your available time helping coworkers with their tasks. It’s tough to be productive when you’re feeling overstretched and under pressure. Let’s make a change. Following are seven steps to take if you want to learn to say “no” to your coworkers, friends and family members. "
― Damon Zahariades , The 30-Day Productivity Boost (Vol. 1): 30 Bad Habits That Are Sabotaging Your Time Management (And How To Fix Them!)