These are extremely good tips. The value of the address of the entity may be marginal (a lot of times, the address listed on the formation paperwork is the address of a registered agent services company, which may handle thousands and thousands of unrelated companies) but searching other databases for the name of the entity (paying close attention to spelling and abbreviation - though often, this gets flubbed in other filings) or the person who formed it can turn up some interesting connections.