What I did differently was re-write my entries, being more specific in what I did for each entry, and providing a detailed breakdown of my hours. I also included hobbies/activities that I enjoy doing and it also helps to show them what you are passionate in. For instance, I volunteer and have done research in a specific area that I have an interest in. Think outside the box for some of your entries and get a few people to read through the application before submitting.
This is my 3rd application, first time no interview and second time waitlisted post interview. Unfortunately, this process takes time, patience, and perseverance. Continue with your volunteering, studies, research, work, etc. and if you haven't done so, get involved in something you are truly passionate in, it does not have to be med related!
I hope this helps!