I believe that it is very beneficial for related questions to be linked together for easy navigation. When you use the duplicate tag, it has the benefit of linking questions together even if the question does not get closed.
My question: Should we use the duplicate flag somewhat liberally, to link similar questions even if the questions are not exactly the same? Or should a duplicate flag be reserved only if you feel the question has an exact match and it should be closed?
I was advised the best place for related questions to show up is under "related". I agree, except I can't figure out how to link a question as "related". If not currently possible, it would be a good feature to be able to manually link "related" questions if duplicate flags are not to be used in this way.