Agreed. I find for myself, for a blog post that is about something else I've done, the ideal length is about 5 paragraphs and it should take no more than an hour to write. Longer than that and it just doesn't get done, or it should be considered a project unto itself and should be managed as such with dedicated time set aside for it. Writing about everything I did in year would be a lot longer than 5 paragraphs, which means I need to break the concept down (perhaps into months, or write something per-project instead).