Once your contacts are streamlined, you should pare down your list. Take a hard look at your combined list of contacts and determine the top 30 or so people to whom you’d like to dedicate the majority of your time. Consider your future goals and how to get the biggest ROI—with your investment being time—when downsizing.
Lastly, determine deliberate next steps for your core 30 contacts—these are the people who are most important to your professional success—as well as your remaining contacts, and stick to them. However you decide to stay in touch, do so consciously and consistently.