Hi Taylor,
When speaking of local businesses, the term 'directories' typically refers to local business directories (like online Yellow Pages) rather than those old-school, low quality directories from days gone by. As a local business owner, you want to get your business listed on the major local business data platforms. Have you considered Moz Local for this, by any chance? Our product pushes out your correct location data to the majors and has become a popular choice for this type of work, as it saves a great deal of time. However, if you want to list your business manually, you'll want to be sure to get listed on Google My Business, Facebook, Foursquare, Factual, Yelp, Best of the Web, Infogroup, Citysearch, Superpages, YP, Acxiom and a handful of other major sources. These local business data platforms are applicable to all local business types, and so many local business owners these days use tools like Moz Local to get listed, instead of slogging through the work manually.
As for the older concept of low quality directory listings, yes, that's an antiquated SEO strategy from a decade ago and should not be pursued. Hope this helps. And, if you'd like to learn more about Moz Local, here's a handy list of features: https://a-moz.groupbuyseo.org/local/features