Follow a character through the seasons. Does one season hold more promise than another? Or does one pose more hardship? Your character could be without a home, or tending to his crop fields, or simply a mother trying to find new and creative ways to entertain her children. How do the changes in nature, in weather affect your character's everyday life?
One specific number is seemingly following your character. This number is everywhere. The change from the restaurant bill, the time of a meeting, the focus of a news report, the bus route number, etc. With each new appearance, your character becomes more paranoid about its meaning. Go!
A wall to block out the encroaching sand and sea. What if all these walls were knocked down, all breakwaters were removed, all attempts to control the sea were prohibited? How would that affect us and our coastal way of life? Overlook the immediate effects and focus on the long term consequences, if any? Or are we a consequence to the sea?