I agree with the rest of you, I don't think we ever really run out of things to write about, our minds just get too full of all the information we are receiving.
Every time I thought I was blocked and didn't have a thing to say, it was because I had stopped writing first thing in the morning, stopped doing meditation, stopped walking outside anyway, no matter what the weather.
It was when I needed a break, but I thought it meant quit.
I listened to the brain that said, "this is just mumbo jumbo, I am tired of editing it."
I can't shut off the flow of words that come pouring from my soul, and if I remember to take the time to write some of it down, anywhere on anything, just to get it out of my brain.
Throughout the day, I go to one of my favorite writing places on line and write free flowing, while listening to music loud, picking through the words that I hear, discovering farther on down the page, I did have something to say.
Years ago, I was taught, no matter what, do the following 4 things anyway, for a minimum of 15 minutes for at least 30 days. If we miss a day, yup, we have to start over. It becomes a glorious day when we succeed that accomplished month. The starting of a habit, gets easier with every day.
The 4 steps are: Write, Walk, Read and Play.