What should I be doing now to best enhance my medical school application?

Being a doctor is a difficult job and requires more skills than just being good at biology. Medical schools are looking to see if you have these skills and that you understand what you're getting yourself in for and you need to show this by the activities you've done and the experience you have. Experience in a medical environment can be a real pain to organise but it's really important that you try to get something. It'd be amazing to get work experience in a top hospital with a world-class neurosurgeon but even by just spending a few hours at your local GP you could gain a greater, and perhaps more realistic, insight into life as a doctor. Medical schools want to hear you talk about what you've learnt rather than just what you've done. Make sure you make notes when you have work experience so you can check back when writing your personal statement and just before interviews! As for demonstrating skills, pick something your passionate about. For example, if you love football commit time to it, show you have dedication, maybe try get involved with coaching or get involved with more of the organisation of your club. Pick a hobby, or a few, and really get stuck into it. Just like with work experience, its not about how many things you do but how much you get out of it.