my school actually had a formal 'shadowing' program in first year, called the Clinical Preceptorship Program, where you were assigned to a local doctor based on your interests. I shadowed in the ICU, and it was an amazing experience. My preceptor was awesome, I got to use a lot of my basic science knowledge (it actually helped me a lot in classes/exams to visualize what I had seen on an ICU patient), and it helped me (sort of) solidify my career plans (I want to do critical care, but there are many paths to get there).
I will also be in a formal anesthesia program this summer where I will get 15% clinical experience in the OR. Since anesthesia is a field we aren't exposed to much in third year, this will be both a great opportunity to hone my interest and potentially get letters later.
in sum, I would say definitely take advantage of being in the wards first year. I came in with not much clinical experience and no transferable skills, and I think I sorta know how this whole doctoring thing works now