How to line myself up for Stanford/Harvard/Wharton MBA going into analyst years

So I went to a decent undergrad, go to a target Masters in Finance Program and am going into M&A at a respected boutique. I want to go to a top MBA in a few years time. I want to do a year or two as an analyst and also live abroad in the EU or Asia before going to business school. What can I do on a high level going in to my next few years of school that will line me up for a top MBA? I got a solid undergrad GPA, will aim for a solid grad school GPA, and have a good job, but I feel like I need a much more well rounded profile to be considered in 2-4 years time. I just turned 22 by the way.