Principles of moral conduct

For denourishing restlessness and remorse, code of discipline and principles of moral conduct are useful. http://www.accesstoinsight.org/lib/authors/nyanaponika/wheel026.html#rest But what are exactly these principles of moral conduct and code of discipline for laymen? There are so many codes of discipline(five precepts, eight precepts) and principles of moral conduct. I am somewhat clear about the codes of discipline, but what are these principles of moral conduct? (some principles in my mind are ten skillful actions.http://www.accesstoinsight.org/tipitaka/an/an10/an10.176.than.html)