First you will need to complete a bachelors degree and all the prerequisite courses for the program you will apply to. These programs are extremely competitive so you will need a decent GPA . Most of the programs also require you to take the GRE. Each school has their own requirements for this. You will likely have to write a letter of intent and possibly additional writing samples. Each school has their own application process so it will vary by school but most of them now use CSDCAS which will only allow you to apply to one type of program so be aware of that. If you want to apply to both types of programs you will need to contact the schools directly. If the schools you applied to are considering you they might ask you to come for an interview. I did two interviews when I was applying to programs and they were very different from each other. Be prepared for clinical questions and personal questions. 

All the best!