Just read business books if you want to improve your decision making skills and leadership books, of course, network etc.

Those publications' content are ephemeral and age quite fast, you don't learn much that can help you develop over time.

Those subscriptions aren't very helpful on what you want to improve, they are good for you to understand the current economic scenario and new hypes and booms, and each have their own biases. I'd prefer HBR over the others.

They are also good for you to keep up on subjects so you can talk with other people that are business types.