In my youth, I read many books, and I still have many unread ones on the shelf. But, eventually, realized that, you only understand what you can create (to paraphrase feynman), and also that, what it means to be curious is to start from a burning problem or itch which differs for each one of us based on something deeper in our psyche.

Productive activities put us often into uncomfortable mental places which spurs growth of some kind - the discomfort is difficult to embrace however, which is why we resist it. In contrast, the consumptive activity comes out of a comfortable mental place and is embraced easily.

So, a question I ask myself is: what problems am i passionate about, and what am i doing (productively) about them. If I dont feel any passion, then perhaps, something is amiss (I am not communicating with my soul so-to-speak), and if I am not doing anything about them, then I need to get my ass moving and embrace the discomfort.