Writer's Blog Block

Having decided to start blogging, I find myself gripped by the same anxieties that I face before starting a new book. Which given that I am about to start a new book means my stress hormones must be in overdrive. I write brilliant, witty, concise blog posts in my head while walking the dog but the ideas dry up in front of the computer. I've told students many times that their ideas are meaningless while they remain in their head, it's only when they hit the page that their worth can be assessed, and here I am doing the same. In my head I am pithy, original, entertaining. It's rather disappointing to discover that on the blog page I am a bit pompous...