It's hard to find exceptions to the guidelines that...

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Ending a marriage that no longer serves you will also serve your spouse and even your kids, if you have any.

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Showing respect to others, especially your children and family members will return value to you ten fold. 

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Lying to another on those occasions when it will serve you both short-term and long-term will likely serve them also.

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Listening and trying to understand others first will not only help others and make them feel good, but will most likely support you in your own interests.

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Saying "no" to others and maintaining good boundaries to take care of yourself will also serve the interests of others in their relationships with you.

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When considering the long-term as well as the short-term, it's almost impossible to find exceptions to the guideline that taking care of your own self interests and taking care of another's self interests will be mutually synergistic.