What does it takes to do a great ER analysis?

Hi guys, i'm still an undergrad student, i've been considering ib for a long time, but i joined one competition (from an Asset Management firm) and now i'm thinking about going into ER and maybe later HF.
But about the competition, we are supposed to deliver an analysis about a single company we find interesting and the board will give the best team an internship. To all senior monkeys here, how can i learn to do a great analysis? Is there any ER team that put some analysis on their websites?
Thank you.