Get good grades in basic sciences. Study like you are going for surgery.
If you have time to volunteer or do research, do that too.
I have a 4 page CV with the last page being all publications. Nobody gives a $hit because my grades are mediocre and my board scores are below average.
Once you get through the electronic score and gpa filter, you can impress people with being normal at interviews.
In your 3rd year you can try and participate in research, or between your 1st and 2nd year of med school do something.
But study like you want ortho, and you will never have to worry about anything later.
Just my 2 cents.