A lot of the podcasts I subscribe to never update so it's no trouble. (Stephen Fry, for instance.)
I listen to podcasts, The Best Show archives, and audiobooks when I'm doing chores or commuting. Dog walking, cleaning the house, whatnot. I'm basically listening to music or spoken word content at all times when I'm alone or working. I have the least trouble keeping up with this stuff, because it so easily fills gaps.
I have a big backlog of everything else-- RSS feeds, TV shows, movies, books, music. Most kinds of music I can listen to while doing other stuff-- other kinds of music require more attention. Unfortunately it's books and movies that tend to get procrastinated the most, which makes me really tempted to take some drastic cutting back steps.
The only TV shows I watch are either downloaded, on DVD, or increasingly on Hulu. On the one hand, it's good in that I don't channel surf. But it's bad because a backlog starts to develop of them-- in ye olden times if you missed a show, you just missed it.