I started off super motivated but I had no system. I just scrolled around in the archives until I saw one that caught my fancy (often for a particular guest, or a Wurster call that sounded intriguing), but soon enough (probably after hearing about half of them) found that I couldn't remember which I had listened to and which I had not. That got kind of frustrating as I would start on one and, half an hour in, realize it was the former. The show definitely stands up to repeat listens, but I pretty much stopped trying to go through them all. Someday I intend to get organized about it and start again at day 1.
For now I'm just too busy with work and life to do much more than catch the weekly broadcast.