You can improve your link popularity score (in search engines) by ....
cultivating link trades with related businesses. This also helps bring targeted traffic to the linked websites.
Perhaps you already have working relationships with other local businesses. For instance, a building service contractor might provide links to local cleaning-related resources such as suppliers, distributors, or even specialized services, e.g., stone restorers or hardwood refinishers.
Work link trades with other services or businesses you personally use, such as your auto mechanic, florist, dentist, exercise club, etc.
Ideally, these businesses would return the favor and everyone would benefit.