I personally find watching live videos helps my game the most at this stage in my learning (particularly Grinderschool), as it helps massively with the critical thought processes. I'm an aural-visual learner though and I think it's important to know what learning style you are if you're going to maximise your study time.

I find books can be okay, but it's important to periodically re-read them. I've found the books I thought were brilliant as a beginner now seem very basic, yet others which were a little bit over my head before now seem incredibly deep now I have a few hundred thousand hands of experience to draw on.