Oh wow so many kwongers here!
Yes, I'm going to the Dream Large Event

Some of the questions they asked in the application last year were:
1. What leadership/community activities have you been involved in?
2. List some of your awards and prizes.
3. What is your greatest achievement?
4. Why is the above achievement important?
5. Write about yourself.
6. Are you an athlete or elite performer? If yes, what is your elite sport or performance activity and level?The application process opens around late September each year. Generally 2-5 grade 10 students are nominated from each school by your coordinator. Around 700 students are selected from 1800 applicants. There is a word limit for each question- it was about 1000 words if I'm not mistaken so you're free to write as much you want as long as it's relevant

Don't try to be cliché
Yes, please don't be cliché; try to include some of your achievements especially your greatest achievement as one that not many students have- this can include your work experience application process. You can write, for example, i was selected to undertake my work experience at so and so which was a very rare opportunity.
Also, ask your teachers about what some of your greatest qualities as a student are and what you're known for at school.
For question 5, i remember that they had recommended us to write about our role models, our goals in life,etc.
You can write about your own personal life and whether you have other commitments outside of school- this shows that you are very well at managing your time and organisation.
For question 1, i not only wrote about what leadership activities i had been involved in but also tried to incorporate a bit of philosophy by mentioning what i value about leadership.
The leadership roles that you have taken can range from looking after your younger brother to being a class captain/SRC member...
If you have been involved in any volunteer activities, make sure to include to include them as well.
For questions 3 & 4, make sure you write down on a separate piece of paper what you have achieved/accomplished. I then spoke to my teachers who helped me decide which achievement i should write about.
I am a very unfit and lazy person so obviously question 6 was not in my favour

But if you're not involved in any sports activities, that's okay

Once i had finished writing my application, i saved it and had it checked by my teachers before submitting it. Just be meticulous with your answers and implicitly include what makes you stand out of those 1800 students who apply each year!
Best of luck!