What do you do at work on Friday afternoons? Mobile devices and online access to the tools we use to do our jobs have made it harder to hide out under our desks and wait for the factory whistle to blow. Still, after a long, hard week, it's easy to let burnout overwhelm you. Don't just coast through the last minutes and hours of your workweek. Use your time wisely, and you'll have a more pleasant weekend, and start next week off fresh and ready to work.