Lots of them are about being sensible.

Remember: what you do when you are young can affect your health in good and bad ways when you are older.

Things you can do:

• Don't smoke
• Protect yourself in the sun
• Eat a healthy diet - plenty of fruit and veg
• Cut down on red meat
• Don't drink too much alcohol
• Keep your body at a healthy weight - not too skinny and not too fat!
• Exercise
• Be aware of changes on your body
• Make sure you check yourself for unusual lumps
• Get any suspicious lump or mark checked out by a doctor - do not be embarrassed! To them, bodies are just like car engines
• Don't stress out!