Intervention ideas

check out a cd at the library. take that cd out, return the cd with a cd of my own. could be myself singing, could be a recording of me giving an inspiring lecture of some sort. id ask them to return the cd by a certain date, and leave a note/cd of their own inside. i would check it out again. either keep this type of penpal thing going or just return the actual cd all together.
 OR take your own cd and put it in the library

write a note on the back of a bathroom stall (with dry erase marker)

find a random address, hopefully foreign, and write them a letter. 

get boys and blue together and randomly go up to an old lady in the cafeteria of tuttle mall and serenade her

ask random people the truth about what they think about people, society etc. they have to be completely honest answers, that usually people keep to themselves and are too afraid to say outloud. id make a montage of these people answering questions in a video and put it on the announcements. the basic idea is showing honesty and how important it is. and also the importance of stating our opinion and not letting others influence us.

get huge bed sheets and block the hallways with them. the sheets will be split down the center and there can be a sign and arrow pointing to it saying "Narnia". this hallway can be the one leading to the media arts room.  when people enter "Narnia" they'll come face to face with a huge poster saying something encouraging or motivating.

get a pizza delivered to my favorite teacher during class. (id pay for it and write something inside the box before giving it to him). i would get another teacher to randomly give it to him. he wouldnt know it was me.

give letters to people who i dont personally know, but that i admire and tell them why i admire them. anonymously. i could find their locker and stuff it in the slits.

i could tape notes on all lunch tables saying encouraging/funny/nice things