Well, you might want to make a list of all the possible themes or genres you're interested in. Then, pick one and start jotting down some initial ideas. Or, take a break and do something completely different. Sometimes, your mind needs to relax to come up with fresh ideas.
You might consider creating a detailed outline first. Think about your characters, their goals and conflicts. Or, take a break and go for a walk to clear your mind. Sometimes, new ideas come when you least expect them.
One way to overcome being stuck in Guild Wars 2 fanfiction due to writer's block is to do some research on the game lore. There are tons of details about the different races, their cultures, and the history of Tyria. This new knowledge might inspire you to add some interesting elements to your story. For example, you could incorporate a little - known legend or a unique aspect of a race's magic system.
It could be about someone who is 'stuck' during Christmas. Maybe they're stuck in a snowstorm and have an adventure trying to get home for Christmas. Or perhaps they're stuck in a small town and discover the true meaning of Christmas there.
One idea is that a child is stuck in a Christmas tree lot. He got lost while his family was picking out a tree. As he's stuck there, he befriends the lot owner and learns about the hard work that goes into getting Christmas trees ready for families. In the end, his family finds him and they have a great Christmas with a special tree.
Just start small. Maybe describe a simple event or a person you know. That can get your creative juices flowing.
Another thing is to find a writing routine. Set aside a specific time each day to write. It could be just 30 minutes. By making it a regular habit, your creativity will start to flow more easily. Also, find a comfortable place to write where you won't be distracted. Maybe it's a quiet corner of your room or a local coffee shop.
First, find an interesting idea. It could be something from your own life, like a memorable event or a person you've met. Then, create a simple outline with a beginning, middle, and end. For example, start with a problem in the beginning, develop it in the middle, and solve it at the end. Also, don't worry too much about grammar at first. Just let the ideas flow.
Once upon a time, there was a city called Everfrost. Time seemed to have stopped there. The people were frozen in their daily routines. The baker was about to put the bread in the oven, but his hand remained mid - air. The children in the schoolyard were in a perpetual state of play, their laughter caught in time. The snow that had been falling gently was suspended in the air, each flake like a tiny crystal. It was a strange and silent world, where the past, present, and future had merged into one still moment.
Well, think about your interests and experiences. Maybe there's a hidden story there. Or start with a simple character and build a story around them. Also, looking at current events or trends can spark some story ideas.
One useful technique is to freewrite. Just start writing whatever comes to mind without worrying about grammar or structure. It can help unclog your creativity.