GirlAnachronism
hey i dont know of too many collage artists but your post reminded me of an art assignment I had back in highschool. We had to make two collages; one symbolizing our ego and the other our alter-ego. exploring yourself and your flaws can be really interesting and can translate beautifully in artwork. here's the links to the two collages i did:

katherine s
i made one sophmore year of highschool and it was on races coming together and the differences and similarities all with pictures and headlines cut from magazines. so any conflicts or the holocaust or anything like that i'm sure will make a huge impact.

gr8rt1
stories, poems, and songs are good starting points. also, go through some magazines and start collecting objects and people(or parts of people) that appeal to you. cut all the background off and movethem around in front of you. that may suggest an idea.