nursing has some advantages in practical terms, but if you don't want to do that this is what to try to get out of undergrad that'll help in ND school
1) learn anatomy/physiology well, microbiology...all the basic sciences you are required to know anyway.
that's it
maybe business classes/marketing can help? I don't know, I never took any, but it's those skills that matter when you finally get out of school. So something to consider.