To choose not to participate in minor, unimportant, or overly difficult arguments, contests, or confrontations, saving one's strength instead for those that will be of greater importance or where one has a greater chance of success. As a parent, you learn to pick your battles with your kids so you don't run yourself ragged with nagging them. The best politicians pick their battles wisely: if one becomes too embroiled in petty debates, one never gets anything done.