The resume needs to be one page only. Human Resource recruiters are very busy and skim over a resume in less than one minute so it is important to make sure what you put out there is quality not clutter. It can be difficult to trim what we feel is important but one page fills quickly so make it count.
--I'm assuming your name will be at the top?
--Get rid of the objective--it's something many resume books have in it but it's clutter. HR knows what your objective is. The cover letter is the place to discuss the actual position you are seeking and a place to expand on your skills and why you would be a good fit.
--I'd also lose the Masters. If you are not even enrolled or close to graduation, it is clutter.
--Get rid of the clinical experience. You graduated nursing school. HR has a general understanding of your clinical background. However, since you are a new grad, you are competing with many other new grads. Externships or your preceptorship is good to keep around but I would put those under work experience and list them first.
--The actual look is fine but order of headings needs tweaked. Education and then work experience. They are the most important and should be at the top. I would get rid of professional development and affiliations and make your next heading Certifications: pending RN licensure, BLS, ACLS, etc. Then a heading for Memberships/Volunteer work: In your case, your volunteer work is pertinent, keep it! List it first, then your Student Nurses Association membership.
--Skills summary needs to be redone. Clear, concise, and short phrasing. Such as, critical thinking abilities, detail oriented, computer literate, leadership abilites.
Expand your margins to 1/2 inch all the way around. The bullet listing under each heading is good but they are aligned too close to the center. You will fit more on the page if you adjust their position so you can fit more in one line.
Remember, keep it one page and clutter free.