I find it frustrating that we tell students to approach medical school with an open mind but then reward those who demonstrate commitment to a field early.
If you're a pre-med or a medical student in your first or second year, check out this piece I wrote with my colleague David Presser MD MPH called "Choosing a Specialty: The Generalist vs. The Early Committer."
The case for deciding early is evidence-based, especially for highly competitive fields, but early commitment has real risks too. In the article, read practical advice for effectively approaching a decision about your field.