For writing do you mean sehs writing or general writing?
For SEHS writing within the time phrame is a huge boundary so time managment is vital which can only be achieved from regular practice. In writing, if you want to shine out amongst the rest I would advise you to use extreme figurative language. When i say extreme i dont mean the normal 'she was as fast as a cheetah' or 'he was like a snail', i mean more metaphoric figurative language. For instance if someone was depressed instead of stating they are depressed which is a low level, use show dont tell to display the sorrow feelings. For ex: I felt like i was a tiny boat stuck in a thunderstorn, each droplet of rain pouring down symbolising the traumatic past i have encountered, each droplet representing the agony and exruciating pain/suffering i have faced. (try to be as crazy as posible to be unique). Additionally, oxymoron is another good feature to make your writing stand out. Oxymoron is essentially plaicng to contrasting ideas together like defeaning silence. Overall, creating a simple plot and including lots of figurative language and description makes you wiriting stand out. Using cliches may also boost down the writing unless they are purpouseful for a comedy effect. I remember for my writing task (narrative) i kept the plot very simple with a boy who has a burning desire to watch a movie in and theatre whose tickets were only affordale by the wealthy;however, he was given the chance for a free ticket as long as he wins a competition. He gets so focused on winning he tends to be selfish and not help share his text with his friend , fearing he would win the competition. I used lots of figurative language and created a moral/lesson about being selfish to make my writing purposeful. The figurative language i used emphasises the pain and suffering he faced. If you have any more questions feel free to ask (or if you can ask the others im sure they will be happy to help).
NOTE- these tips are for narrative.