Decisions - Indecisions

Every had a moment where you couldn't think and drawing a blank? Have a moment where you had to think on your feet? I am learning about this blog and the ability to create many personal things to your blog - I cannot think what I want or what I should say. My mind's a blank. Is it because I feel overwhelmed with all the possibilities that comes with the blogging thing or is it because I am tired from the weekend?