Today, make a list of all the things you know about.
Chocolate Whole Bag Eating
Hot Air Ballooning
Sitting in piles of laundry
Forgetting important things all the time
The list should go on and on and on and on. All the things you can think of. As you write, each item should bring up even more ideas and and those ideas can each be a limb of your brainstorming tree with many many smaller branches and twigs and leaves coming off, each labeled with names and faces and scenarios and ideas. See if one branch burns brighter than the others. Maybe that is your next book.