Thanks for the answers everyone and apologies for the thread having a misnamed subject line. I wrote the subject line while trying to work out how to articulate my post and forgot to edit it once I had written the post.
So to summarise: to develop my skills and portfolio I should focus on how to facilitate conversation between my team members, developing a network, communication and then general project management skills such as time management, change management, etc.?
I've had (admittedly limited) experience as a producer in a couple of student projects so at a basic level I've been able to start developing most of those skills, but I was wondering what would be required in industry and what to develop further. It's good to see that a lot of the skills I've started developing already are the ones required and are the ones I need to carry into industry. One of the main things I was aware of needing to develop personally but haven't developed enough is a broad enough knowledge of each discipline so that can be one of my primary focuses to develop and learn. That and how to lead a project more as feedback from my last group project highlighted that I was too passive and while I was a facilitator, I was not really enough of a leader.
Much appreciated.