If you have to write every day, you might as well make it interesting. This is why I often write to learn instead of the other way around.
What do you want to learn? This is the one question I ask myself every day.
Today, my answer was I want to understand how anyone can write daily without being paralyzed by an absence of topics.
Curiosity is one of the best motives to act. What if? What about? How? Why? Humans are voyeurs, figuratively, and sometimes literally. It's in our best interest to leverage this biological trait to push ourselves further.
Of course, learning is not a one-step process. This is why sometimes it's better to break down my initial question into several ones: what do I want to see, feel, taste, touch, hear, smell? It is primordial for every writer to awaken his/her senses, to give an incentive for the Muses to possess you.
In other words, you have to write to think, and not think to write. The latter is not without worth during the editing phase, but you have to completely abandon yourself to the stream of thoughts writing provides you to remain authentic. Just like it is common sense in love, you do not want to calculate your approach: creativity is both spontaneous and long to cultivate. Instead, you have to let the words guide you, just like a child letting her train of thoughts getting the better of her soul, without judgment.
Writing is meditation.