I think this sort of approach depends heavily on how good your attention span is -- that is, can you focus deeply at will for a certain period of time, even if

I think this sort of approach depends heavily on how good your attention span is -- that is, can you focus deeply at will for a certain period of time, even if it's only ten minutes -- and how good your memory is. I've spent two hours getting twenty minutes of work done because my mind wouldn't stop wandering, and my memory isn't so hot so I often need to review things. If I could focus like a laser and I had near-photographic memory, my life would be very different and this would sound possible to me. As it is, it doesn't.