When I am screening applications and interviewing it is hard to define what makes someone 'great', but I can tell you what absolutely will keep you from being interviewed/hired:
1. Bad grammar
or typos. I will not interview anyone with these on their application or resume- it shows a lack of attention to detail.
2. Being late to an interview- actually just interviewed 2 great candidates and one got the job because she was on time.
3. Speaking softly- this seems strange, but it happens a lot. Speak up and talk with confidence. Make sure your resume rings with confidence also. If you don't believe in yourself, why should I?
4. We often ask applicants to describe a time they broke the rules to do what was best for the pt- do not answer with something that is unethical or illegal.
That sums up the things off the top of my head that keep people from being hired. I would really highlight your strengths, your clinical experience, use your preceptor as a reference if possible. Be open and flexible, including filling in as a CNA, although it raises questions when I see a nurse who graduated, but has only been working as a CNA. Even if you can not get a job, become really active with the nurse association in the city or state. Network as much as possible. Good luck!