We all know how important networks are in all the different parts of our lives whether medical and health, financial and legal, and especially work and career. What many do not know is that to be successful as a manager and leader, you need not one but three networks: operational, developmental, and strategic. First, of course, is the network of those you and your group need to carry out your day-to-day work. These are people in other units of the company, and outside, on whom and whose work you depend. This is your operational network. Those in it don't work for you but your success depends on them. It also includes those who depend on you and your group to do their work. Though you may not need them, their demands on you can have a big impact on how you spend your time and attention.Your developmental network is the collection of individuals whom you trust and to whom you can turn for a sympathetic ear, (depending on their experience), and a place to discuss and explore professional options. One way or another, these are people who help you grow as a manager and leader.You create both operational and developmental networks naturally. The people in your operational network are those you must work with everyday. And most of us naturally turn to knowledgeable friends and acquaintances for personal help with professional dilemmas. You may not have thought about these two collections as networks, but they are. In our experience, most managers spend too little time and care on building and maintaining them. They're mostly forged by immediate need and happenstance, and they often lack key people. But most managers create them, if only in rudimentary form. The third network you need — your strategic network — the one many managers don't create at all because it doesn't happen in the everyday course of work and life. A strategic network is about tomorrow. It comprises those who can help you do two critical tasks: first, define what the future will bring and second, prepare for and succeed in that future. There will be some overlap between this network and your operational network, but the differences are likely to be significant, too. Nobody can predict the future, but that doesn't mean you needn't worry about it.  Even if you cannot know what's coming, you still need to identify what might happen — the most probable futures that lie ahead — and think about how you might prepare for them.You need a strategic network because the forces that drive change in your field will probably come from outside your current world.  That means you need some way to discern those forces when they first appear on or over the horizon, not when they arrive at your door. That's the purpose of this network. Your strategic network consists of outposts — individuals who work on the horizon of your world and can see into the worlds beyond, both inside and outside your organisation. Because there are many worlds surrounding yours and you can't predict which will produce the invading forces of disruption, you need several outposts to create them intentionally because such relationships won't develop naturally. That's the tough part. The good news is that your links to these outposts will mostly be what sociologists call "weak ties”. You connect with them only on occasion, perhaps once a month or even only two or three times a year. But once you've made the connection, you can keep it alive with the occasional email, phone call, cup of coffee, or hallway chat at a conference you both attend. And, once you have made the links, each outpost will know your interests and can let you know if anything of consequence to your world occurs in theirs.The writer is a Young Entrepreneur and the Founder of Easy Goal Entrepreneurs Network.To join the Network Email: easygoalentrepreneurs@yahoo.com