Summarize the following:
If you want to write sad stories, you'll have to start by seeking inspiration. Consider what makes you sad. For about 10 minutes, free write on the topic of sadness. Talk about the kind of situations that make you sad.  There are a lot of changes that come in life that can make people sad. Friendships and other relationships ending can cause sadness. The death of a loved one can also make someone sad. Sadness can also be caused by more minor events. Losing a family pet can be sad. Having to move to another city can be a cause of sadness. Consider what you think sadness is. What thoughts and emotions do you associate with sadness? As you write, talk about your own personal experiences with sadness. For example, when in life did you feel the most sad? Why? You may be able to use experiences from your own life in a short story. The best way to become a better writer is to read more. If you want to know how to write sad stories, you'll have to read a lot of stories with unhappy themes and plots.   Read sad stories. Ask your friends and teachers for recommendations for sad stories. As you read, do so actively. Pay attention to how writers build their stories and characters. How do the stories start? How do they end? Why do you have an emotional response to these stories? Ask yourself these questions as you read. Pay attention to what works in these stories. When writing a short story, you only have a short period of time to get your reader's attention. As you read short stories, pay attention to opening lines. How does the writer get your attention? Where does the story start? Many short stories may start when some of the important actions or events have already occurred. Authors may recount such events in flashbacks or imply them through means like character dialogue. If you want to write a story, you'll need to know basic story structure. Stories are made up of exposition, rising action, a climax, falling action, and a resolution. The first parts of the story come with exposition and rising action.  Your exposition comes at the beginning of the story. This is where you explain who the main character is and what he or she is doing at the beginning of the story. Exposition should be brief and grab the reader's attention.  A story's rising action is the series of conflicts that move the story forward. No story can exist without a problem that needs resolving. In a sad story, there should be an element of tragedy to that problem. For example, maybe your main character is caring for her sick dog. The rising action could include her taking the dog to the vet, finding out the sickness is worse than she thought, and struggling with the setbacks and challenges of her dog's medical needs. Once you've figured out basic story structure, write a short outline for your story. Write out how your story will begin, what rising action you'll include, the climax, and how the story is resolved.  An outline can be brief. It's not necessary to use full sentences in an outline. You just need to have some sense of the basic events that will occur. You can separate your outline into the five elements of story structure: exposition, rising action, climax, falling action, resolution. An outline should use numbers and letters for structure. Big headings, like "exposition," can be marked with a roman numeral. You can use letters or regular numbers to elaborate on aspects of that heading. For example, "I. Exposition, a. introduce Susan." To help you see how to write an outline, let's return to this article's example. You could begin the outline with something like this: "Exposition, a. Introduce Ada, crying in art class, b. Sad to be reminded of her father's cancer, c. Returns home alone (her mother is at work) to help care for her ailing dog."

Summary:
Free write about sadness. Seek inspiration. Learn how to begin a story. Outline your story.