When I feel like it.
That's usually what I do too, but it doesn't always work that way. Like now fo example, I am currently re-watching my DS9 DVD's, but this wasn't planned. One morning I was in pain and exhausted, and while having breakfast (and pain medication), I felt like watching the DS9 pilot episode. When it was over, I didn't want to get out of my chair, and the disk was already in, so I watched episode 2, and then, and the end of that, same thing with episode 3. Following a nap, I decided I wanted to see more, so I put in disk two, and in the six weeks or so since, I have nearly gone through the first five seasons, averaging one disk, or half disk depending on how much time I have, every day. Two disks every Sunday.