I think edw519 used to write in length about 'just-in-time-learning', calling it 'pull learning' (as opposed to 'push'). See, for instance, comment 71 in [1].
My rabbit-holing doesn't always resemble your approach; I often end up reading a book on a topic I'm just interested in, without a particular project or feeling of lacking knowledge. However, I try to transition myself into more JIT-learning/pull-learning style, so that I learn things at the same time I try to get something useful&interesting done. This mindshift is probably mostly due to HN (and we're looping back to rabbit-holing :)) - especially the prevailing emphasis on 'shipping the damn thing'.
My rabbit-holing doesn't always resemble your approach; I often end up reading a book on a topic I'm just interested in, without a particular project or feeling of lacking knowledge. However, I try to transition myself into more JIT-learning/pull-learning style, so that I learn things at the same time I try to get something useful&interesting done. This mindshift is probably mostly due to HN (and we're looping back to rabbit-holing :)) - especially the prevailing emphasis on 'shipping the damn thing'.
[1] - http://edweissman.com/53640595