Keep a to-do list, but make it short.
Compiling a to-do list can help you prioritize tasks and stay focused. But these lists often backfire, says Rock, because we fill them up with too many tasks. As the day rolls on and we see only a few items crossed off, we freak out because we "got nothing accomplished" and become more frustrated than focused. Make shorter lists. "Jot down no more than three tasks that you're absolutely committed to tackling," Rock says.