Back in the olden days when compile times were long I almost always had a book on programming or management at my desk and was able to buttress my experiential knowledge with theoretical. These days where turnaround times are so low that I can't even find my place, I haven't kept up in my reading.
I wonder if this could become a pervasive problem for rookie game developers and programmers - on the bright side, you're spending all your time getting stuff done - on the down side, maybe those long periods of head scratching and perusing manuals and websites trying to figure out "why doesn't this work?" could have been bypasses if you had already read the manual or language guide or whatever. Plus you'll possibly be out of the loop on the latest in good coding techniques which you may also pay for in the long run.
I don't know. When do you find time to read these days?