Being active in our professional associations and staying connected is the best way to hear of opportunities in my opinion but always preparing and learning will position you to be the best person for the new job. Decide what area of expertise you are interested in and be #1in that field and then they will seek you out.
The ADHA has a great list of career paths besides clinical:
http://www.adha.org/professional-roles
educational …
CORPORATE DENTAL HYGIENE – RDH Magazine
http://www.rdhmag.com/…/corporate-dental-hygienebrits-not-just-sales.html