If you see an opportunity that someone in your network might be able to bid for, let them know.
Professional relationships strengthen over time, so make sure you stay in touch with your network.  If you see an article that a colleague might like, ping them over an e-mail.    If you see an opportunity that someone in your network might be able to bid for, let them know.  There are many ways to stay in touch, and you might prefer to use a professional networking site like LinkedIn.   Online social networking is a very useful way of supplementing real-world networking, but it certainly doesn’t replace it!