Don't assume that everyone follows up an interview with a note, because very few candidates actually do. By showing your appreciation to those who have helped you in your job search, you'll build your network and keep allegiances strong. Do continue managing your career and building up your network, even after you secure the perfect job. Update your r sum periodically, while the information is current and fresh in your mind. Record your achievements and recognize how your efforts have made a difference and benefited those who employ you.
Career management is an ongoing process.
Do offer to help others in similar situations and become a mentor. It may be harder or easier, but chances are it will be different. The methods used to secure the last position may not be the methods that succeed in securing the next. Use all the avenues available to you in this job search. Don't set your sights on the one perfect position and stop all other activities and search efforts.