How is this? Start with today's date, then just list some things that are on your mind. If your inspiration can't be sparked by something that you just wrote, list some of your favorite things, and see if you have anything to write about them. By this point, you've probably already filled a page and come up with writing ideas for about a week. Considering this sort of brainstorming is how I practiced writing on a daily basis for years, I can say from personal experience that it works.
However, I don't really participate in brainstorming sessions anymore, nor do I use many prompts. Why is this? It's because sometimes it's okay to just let ideas come to you as they will. Unless you desperately need to fill a need for some assignment, not filling a page is not some crime. Just jot down things in a notebook or some organization program like Evernote or a memo pad app of some sort. That way when you're starved for ideas later, you still have them. Then you'll fill many pages just from that single note.
Still, I've found more often that not, as long as you go into any writing with a purpose, you will fill that page. It works similarly with art. In photography, just point at whatever and shoot. In drawing or painting, just doodle for a bit and work from that. You'd be surprised in these supposedly dark moments of lacking inspiration that you'll find the beginnings of some of your best creative work ever.