Productive time is spent building your business, marketing and working on billable tasks.
Super productive time is spent creating systems that will bring you money and do your marketing without you having to be there.
For instance you can bake pies for your shop, or you can hire and train others to do that. Then your income is not tied to the amount of time you spend.
Rich Shefren talks about this in his Attention Age Doctrine. It’s a relatively quick read, packed with great insights and how-tos.