How to prepare for grad school? [with 1 year to spare]
Your PhD courses usually dwell on foundational articles. Buy/borrow a "reader book" that has all (or many) of these articles in one place.
Get a part-time job in a field associated with one of the subject groups that you would study/focus on. If you are interested in the geography of farmers, see if you can work as one. Keep it part-time.
Get in touch with the local anthro- group.
More meta: by whichever means, find out where the field is and where it is going. This may highlight some new skills that you need to work on minimally. For instance, social science now has a robust quantitative component. Anyone who ignores that is playing with fire.
Don't add more shit to this list.