I'm applying right now, and I definitely don't mind giving you advice about the application cycle! It's never too early to start, so that brings me into my first piece of advice.... DEFINITELY start early, because you'll probably end up writing 4-5 different versions of your personal statement by the time you actually submit it. Also, start thinking of things you can do to build your resume and make it awesome so that when October 15th rolls around (the first school's deadline, I think Penn's was October 15th this year), you'll be adequately prepared to submit and be a competitive applicant! As a CNM hopeful, experience in L&D as a volunteer, or shadowing, would be looked upon favorably. Or at a midwifery school, if you have any in your area! And so would training as a doula, if this is at all possible for you. And for the BSN portion, any experience with the underserved is awesome as well (aka, volunteering for a free clinic). Basically, any health care experience is good, but these things are GREAT and will really give you an idea of what it is like to work in healthcare, and in your field!
Also, look at prereqs for schools
and make sure you meet all of them, and if not, make arrangements to take them over summer and/or fall if necessary! For example, Emory's program really appealed to me, but they wanted you to take chem 1 and chem 2 and I only had chem 1, and it was too late to try and take chem 2. I think Case Western's program was the same, as well.
Begin studying for the GRE now so you can take it at the beginning of summer. It'll be a huge relief to have that done. Not every school requires it.... Johns Hopkins, Duke, Marquette and NYU are a few that don't, but those that do require it really like to see high scores. This is one area of my application that I wish was stronger, but only Penn required it so I didn't want to take it again. However, if you take it in May or June, and you don't get the score you want, you'll have time to take it over again in September. And take the TEAS as well! It will be helpful if you want to apply to other types of programs (and Emory requires the TEAS anyways).
Let me know if you have any specific questions!