You should be writing fast. Faster.
All good writing is done fast. If you don’t know what to write, keep writing anyway. If words won’t come out, just put in ”blah blah blah” until something comes out. When you realize how fucking stupid it is to write blah blah over and over, you’ll come up with something. Don’t filter yourself, just write. Dump your brain on paper. Clean it up later.
Here is a really good way to write fast. Once you have an initial topic, a spark, an idea you’d like to express… don’t write it out completely; not yet.
Instead what you do is, you start collecting notes. Create mindmaps, write down thoughts on index cards, business cards, scraps of paper, napkins, whatever.
The more you activate and stimulate your brain about this particular topic, the more ideas will come. You’ll read an article on a blog or in a magazine and you’ll make a new connection, and there’s another idea.