As you can tell from this post, I’m a big advocate for the less-is-more approach :) So, once a week vs. once a day sounds better. BUT Sam Mallikarjunan made a good point earlier on the comment thread, “blogging is like jogging.” If you just want to get better at organizing your thoughts in writing…write every day! But if/when you’re ready to start winning the attention of a big audience, I would say go for the big-win approach. Create 1 thing that’s super compelling then syndicate and promote like crazy. And there’s no reason you can’t do a blend of both. Maybe some weeks you focus on a topic per day just to get your thoughts down, and then you spend the next 2 weeks working on a really big item.
Hope that helps!