When you are out of inspiration to write the best solution is to just write. With no hang ups or expectations over whether it is good or not. Tim Ferriss said of one of his mentors when writing a book the goal should be to write one crappy page per day. Similarly, morning pages is just a practice of writing three pages each and every morning. No agenda, no purpose, just write.
This gets you into the habit of doing. And it is amazing what you can achieve when you make a habit of doing something small every single day.
James Altucher has a list of things that he needs to do in order to avoid himself falling off the precipice (as he has been bankrupt a number of times). One of them is to write ten ideas per day. They can be random ideas or ideas about a theme. For example, ten businesses I could start today or ten products for cats. The goal is to do the doing, not to come up with a great idea to run with. Of course, this is likely a side benefit. In having no expectations your mind will be free and will likely hit a great idea after doing this practice for a while. When you can let your mind be free, great things can happen.
How much of your current situation is a result of your current thinking and actions? All of it.
You are what you consistently do. And you do what you consistently think about becoming.
Get into daily practices that open your mind and the rest will follow.
I recently tried a flotation tank and the owner said that you rarely get out of a float what you want but you always get what you need. Some people have experiences like being on psychedelics. But if you are burned out and do not have the time to be creative then this is what you need - time and space. Or maybe just a sleep.