I thought that it was just me.:-)
Perhaps try something like timing yourself? Set a timer for 30 minutes choose a subject and only create something within that time frame… then go back to it like an hour later or whenever, if you feel so inclined. 🙂 There’s a facebook group, if you do that, that’s called “Daily Spitpaint” and it’s full of artists novice to “professional”,as well as digital to fine arts, that post there art afterward.
Also, maybe try getting a tape recorder or a small notepad and record/write down your ideas even if they seem silly. Then you can go back to them later when you’re ready or you’re looking for ideas. I try to do it, but it definitely takes some habit forming. Just some thoughts is all. I hope it helps. 🙂