What are some good & Bad things for a early-teen's health?

I'm doing a brochure on this for a spanish project, and i was just wanting some good things/Bad things for a early-teen's heath. Actually, on my paper, it says an average Middle Schooler.

Bad things- drugs, unsafe sex, alcohol, Puberty.
Good things- social life, First kiss or first time sex.
Really the list is endless there are so many things you could write about, it would be a good idea to go and talk to some middle school teenagers and get their opinions.

well you could Say that junk food is bad and that even though we get bored and we want to play games its bad for us(even tho that's Wat I'm doing right now, I'm supposed to be doing geometry LOL)