I passed NCLEX in my first try about 2 weeks after graduation. I personally was fed up/burned out with school/studying and didn't want to wait a month or two to take it. My recommendations- Review course of some kind, Don't overstudy, study weak areas/points of emphasis on exam, do review questions that offer rationale for the right answer. Have her not get down on herself and let negativity sink in (I did that before the test, and it just caused added pressure and stress). NCLEX is nursing "utopia" not real world nursing.
Some other recommendations that I was never recommended, but think would be helpful- If she knows how she learns best, have her try to learn by doing that. If she knows she has a weak area for a particular diagnosis or field of nursing study that is kind of major- Have her talk to a friend in nursing that works with those particular patients where she can ask about patient signs, symptoms, presentation, drugs of treatment, side effects to the drugs. It might register easier that way.
Finally, I recommend that she has activities that can reduce the stress in her life. Try to relieve all "test day" stress- Get on a good sleeping schedule for a week before NCLEX, don't mess with the sleep schedule, be rested, Know exactly where the test center is, best way to get there. Get there EARLY. At the test, have her do anything that calms her nerves (I used to pray, self positive talk, counter negativity with positive thoughts). If she gets added anxiety at question #76 if she's still taking it- Remind her she is still in the ballgame, and it doesn't mean she failed. If she has to take a break, take a break. I personally had to take about 30-60 seconds to do re-focus and energize myself. It took me about 114 questions overall.