Here's one important tip to remember when navigating the vagaries of human relationships: You don't have to choose between being kind and drawing boundaries. Both can be done simultaneously. In other words, you can be courteous without permitting others to step over you. You can be firm without launching into an expletive-laced tirade. Unfortunately, some people struggle to walk this fine line. They can't help but vacillate between outright rage and saccharine kindness. You'venbecause a person likes you doesn't mean they respect you. And if you never stand up for yourself -- in a diplomatic manner, of course -- they'll just assume they can get away with everything and anything. This extends to all relationships in your life -- your marriage, your friendships, and your work relationships included. Now, standing up for yourself doesn't have to mean engaging someone in a fight, whether of the verbal or fist variety. In fact, merely walking aw...