Maintaining a professional network requires effort and consistency: 1. Regular Communication: Keep in touch with contacts through emails, social media, or phone calls. 2. Attend Meetings and Events: Continue attending professional events to meet new people and reinforce existing relationships. 3. Offer Help: Be willing to help others in your network, whether it's through advice, sharing resources, or providing support. 4. Stay Updated: Keep your knowledge and skills updated, and share relevant information with your network.