First, I believe one major impediment to a more balanced expression of ideas is that I still have to be at a keyboard when entering data. I simply do not spend the majority of my day near a PC; therefore, I might not be able to capture the good ones when they're available.
Then, there's the very complex process of sorting and deciding what to say. Of the millions of possible ideas I could express, most simply don't fit well into a box of typed text. Perhaps some of my thoughts today have never even made it into language form.
Also, many of my ideas might have been fleeting. Others may have lacked coherence. I cannot think of an appropriate term for the smaller material of which thoughts are composed. Let's call them atoms. I would venture that the single atoms of thought, do not a blog entry make.
Lastly, on some days, and today may just be an example, I may simply not have any useful thoughts or ideas to share.