I want to join the Peace Corps after I graduate, what can I do to make myself a perfect candidate?

I am a freshman in college and want to join the peace corps after graduation… what things should I do to build my resume and make myself a perfect candidate?

Should I join the Peace Corps before or after graduate studies?

I am currently going to be a junior next semester in undergraduate studies. I am a history major with an above average GPA. I am a member of Phi Alpha Theta (History Honor Society), a member of my schools mock trial team and also a member of an environmental volunteer group that monitors [...]

what is a post graduate degree related to ecology, writing, rhetoric, permaculture and peace studies?

i finished my bachelors in june and i’m thinking of going back for a post graduate degree. i don’t know where and i don’t know what course. but i am interested in these things and would like to find a course that incorporates them:
ecology
rhetoric
creative writing
permaculture
peace studies
ideally it would be an accredited institution.