Make a list of things that have bothered you in the last few days: stuff in your personal life, stuff in the world, stuff at work, stuff in your community, etc. Now, pick one item from the list and write about what could very well be the deal with that thing in ten years.
That could be an assessment of the state of the climate crisis over the next decade, or that could be an funny essay about your neighbor is listening to “Watermelon Sugar” at 2 a.m. Whatever speaks to you from your list, have at it.