There are innumerable reasons why we make ourselves so readily available to do things that we don't want to do. We want to be agreeable and liked. We don't want to appear selfish. We don't want to disappoint anyone. We want something done our way or no way. We don't want to miss out on a poorly timed opportunity. We want to appear in demand. But what's really behind all those excuses for choosing to overpack our schedules with more obligations when we've already got a full plate?