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Phrase(s): Cross the stream where it is shallowest.
Prov. To do things in the easiest possible way. • Jill: How can I get Fred to give me permission to start this project? Jane: Cross the stream where it is shallowest. First ask Fred’s boss for permission; I’m sure she’ll give it to you. Then Fred will have to agree.
McGrawhill's American Idioms And Phrasal Verbs