Reward yourself.

Multitasking is the mother of all distractions. Your attention is pulled from task to task, and both tasks can suffer. One tactic can help tame your tendency to multitask: get rid of distractions and commit to completing one task before switching to another. Better yet, promise yourself a "reward" when you're done. When you've promised yourself something on completion - a walk, a quick errand, or a much-needed refill of your coffee - you'll be more likely to stay on track.