1. You should go to bed earlier
2. You should study more often
3. You should write it somewhere so you won't forget it
4. You should put more effort in it
5. You should get up earlier
6. You shouldn't care, It's your business what music you like and your friends should respect it.
7. You should take drama lessons or go to an acting school.
8. You should spend more time doing it. Ask your friends or teacher for help.
Remember, practice makes perfect.
9.You should ask your teacher or friend to explain it to you.
10. You should try to eat a bit less.
11. You should take some swimming lessons before going canoeing, It might be very dangerous and end with a tragedy.
12. You should find someone, there's a lot of offers in teens magazines.