Getting into medical school requires more than just getting stellar grades and good MCAT scores. Many students perform hours of volunteer work or scientific research in the hopes of convincing the admissions committee of their commitment to helping others. However, there exist many other avenues which demonstrate your work ethic and personality to the admissions committee. I will discuss three examples of how you can stand out from the crowd by combining your hobby with medicine...
I'll also add my perspective. I like the suggestions, but my experience with admissions committees shows these suggestions may not have a favorable impact, which I infer from the OP's question when it comes to application review.
1) Combining art and medicine.
It's very challenging to get your work posted in hospitals. I would say get involved with your hospital's office that works with art therapy for patients and caregivers. It can be non-clinical volunteering though it can be clinic-adjacent. (If you have another gallery on campus that would show your work, that's great and is distinguishing.) If you have an online portfolio/gallery of your work, that can be shared in an application, though I assure you most of us won't look at it.
I have had many applicants give small concerts or be part of ensembles performing in hospital settings. You need to connect with the hospital's office that works with the community when it comes to this. Just because there's a piano in the lobby does not mean anyone can just go over and start playing. Not too many will stop you, but I have known a few people get into trouble for doing just this. I'm sure you have videos of your performances that you can easily share when requested.
So to get to the point: not all admissions committees value these activities to the same extent as my colleague suggests. They are more impressed with the depth of accomplishment in that area, such as participating at a competitive level in art or music competitions. If you have sold your art or have performed in the amateur Van Cliburn (which I think just happened a couple of weeks ago), that would move the needle more. Yeah, the altruism element is very helpful, but unless you do this semi-professionally while as a student, the number of hours you can compile will not be enough to overshadow the usual expectations of bread-and-butter community service and altruism.
I agree there is a value in having a sense of aesthetic appreciation and highly tuned observational skills that art/medicine offers. One should seek medical schools that value medical humanism (through collaborations with local museums). I definitely consider having these talents a "plus", and you will have many opportunities as a professional student to showcase them.
2) Technology to help others
In the current era of Tiktok/IG takeovers/monetization as an influencer, I would be very careful with this. If you are a bonafide reporter for your local/campus newspaper looking at medical issues, having such a blog (can I also say "podcast"?) is good to have. It is something to put into an application. Still, despite any arguments I have brought to the table, this does not move the needle for screening or post-interview deliberations in my experience. If anything, being a regular contributor to your campus newspaper or publication would make you stand out IMO.
Now, many current medical students run their own blogs, Tiktoks, IG's, etc., to monetize their position as medical students helping other medical students with the application process. I'm sure there are a few that also do the same to raise awareness and help with health education to the public. With this in mind, there is a reason why there are social media policies at most schools and universities... you may be disappointed that admissions committees really have a wary view of this.
If you do this, scrub your online profile regularly.
3) Travel and medicine.
I absolutely concur with
@LizzyM. Alternate spring break is very helpful, but going abroad is not favorably looked upon among many in admissions. The system outside the US is too different. I will agree with documenting and keeping diaries, but unless portfolios become a requirement for admissions, this is of limited value. You can share with your prehealth committee or postbac advisors who help you, but I would be very wary about its value. If you do go abroad, NEVER directly participate in any patient procedures, even if the supervising doctor allows you to.