manage unstructured date is really difficult but Solr, Elasticsearch and Amazon Web Services' Cloud Search are three examples of search and unstructured data management solutions that can help organize and structure the apparently amorphous text data so common in today's enterprises
The question of managing unstructured data is very broad and impossible to answer with a definitive correct answer. NoSQL is different than relational databases but the data have some kind of structure. This structure is different than traditional relational databases but it is not correct to call them unstructured.