A good project manager can make a huge difference when you're trying to execute your projects. It's not just about tracking tasks and hitting dates on a calendar - a good project manager also has domain expertise, and can help to spot risks, and make sure the project goes smoothly - whether that's migrations or product launches or fiber builds.
For more information check out cbsrome.com and in particular this blog post for a quick reference on project management best practices. Or connect with Tara on LinkedIn.