1) This was my big goal for the year. One book a week that I've never read, instead of getting in better shape, learning a new hobby, etc. Judging from prior experience, it felt difficult, but doable.
2) It was mostly about time management. This was either accomplished with reading incrementally (infrequent) or bingeing over a weekend (frequent). I think if I was going to do it over, I would shift most of the reading into the first couple months of the year where the weather is dreary and not conducive to being outside.
3) Cheating. I've had books (like GEB) on the list the whole year that I haven't gotten to because I knew that they would slow me down and ruin the average. When I would read something that I couldn't get through quickly, I would make up for that by reading books I knew I would plow through quickly. You can see that more towards the end of the year.
4) I truly enjoy reading, and it's something I'd rather do than many other forms of entertainment. This helps immensely when deciding to devote a large amount of time to it.