A hodgepodge of ideas spewing in my head

As I sit down to write, I have a hodgepodge of ideas spewing in my head, but none that has taken hold in any immersive way. Usually a blog post has a single topic of focus, and I try to go somewhat deep into it. But this approach can be problematic: If I don't have an idea that catches my attention, I feel I have nothing to write about. Hence, I'll skip my writing time “until the muse strikes” or something. But then days pass without the muse striking, and I start to wonder if I've gone about the creative process all wrong.