Your network is a long term asset so treat it with respect. Demonstrate that you are trustworthy and someone that others want to be affiliated with in business.
Strategically build your network with professionals who you believe could be helpful down the road. Also, look at any gaps that your network may have and fill those by meeting the appropriate people.
LinkedIn is a great tool for finding some of the people who you wish to meet. You can also ask some of the people in your network for introductions to certain people.
As you build a network of scale and diversity, you will be able to reach out to multiple people when a need arises. Your network can be a powerful business tool when you have an issue that you need to solve or a new client or partner who you are trying to meet.
Take your relationship building very serious because you should be building your network for the long-term. Your network is one of your greatest assets that can move from company to company with you.