The Why of Blogging

I'm a writer, or at least I'd like to be. I haven't written anything with any substance in over a year. It's discouraging and disheartening, and it makes me feel like a failure. I want to write. The ideas are there, I'd like to think the talent is present and accounted for as well, but I haven't put pen to paper (or fingers to keyboard) in 12 months or more. Why?
You tell me.
People blog for many reasons, personal, political, and otherwise. I'm just hoping to get my wheels in motion, figuratively speaking. This may be a glorified journal of my daily activities, or a laundry list of complaints, but just maybe, if I'm brave enough, I'll start a new project or two, and share them. I welcome any comments or advice.