Other than working hard to develop a solid fund of knowledge, passing the USMLE Step 1, and maintaining a professional & friendly demeanor (so that you don't rub attendings / residents the wrong way or weed yourself out during interviews), you don't have to worry so much about being ultra-competitive.
Take a look at the NRMP website for info and statistics on the match.
http://www.nrmp.org/data/chartingoutcomes2011.pdf
http://www.nrmp.org/data/resultsanddata2013.pdf
Pathology residency spots did not fill last year, and residents at my hospital have voiced concerns regarding the job market - however, since I am not involved in pathology, my words have very little weight.
Nonetheless, prior to engaging your pathology department, consider researching what pathology residency and life as a pathologist is like, as well as the variety of career fields pathology offers.
This is a link to an older blog post that I found interesting some years ago regarding path:
http://choosepath.blogspot.com/
When it comes down to the specialty decision making tree, I am intrigued on how your answer to the following 2 questions will change as you progress in medical school.
1) Minimal Patient Contact vs Patient Contact
2) Surgical vs Non-Surgical
Good luck! Path was one of my absolute favorite subjects in school!