Stuffing one more activity into your day could be the straw that breaks the camel's back. But you may not realize anything has gone wrong until after the fact. The entire house of cards might need to fall in order to alleviate the tension if you stretch your commitments too far. Even if you're confident that all is well in your world today, it's still smart to lighten your calendar before you find yourself in hot water. Sometimes saying no to one thing is really saying yes to everything else.