First, you should clarify what it is you want to do. What type of "a job" do you want? Then reverse engineer how to get there. The more fancy a job you want, the earlier you need to start accumulating some sort of social proof you are a "high achiever", especially if there is nothing particular special about your background. If you're not sure, your best best is probably to go after the best opportunities and experiences which are available, and go from there.