For me, the key to being successful was learning how to dissect those damn questions! You have to learn to mark out distractors and extraneous information. Look for hints like "what should the nurse do FIRST" or tricky ones like "which is the "LEAST". Look for repeats. If one of the answers includes the same wording as the question, that one is probably the winner. Lastly, stick with Maslow. What's the most important. For example a patent airway is more important than skin care or diet teaching.
I completely tear up my questions. I never turn in a test without marks. I'm sure they would look crazy to some, but I mark through everything I don't need. If you have time, cover the answers and think or write down what you think the answer may be. It's easier to clear your thoughts that way. Changing answers is usually bad

Take your time, read the question two or even three times if you need to. Make sure you understand what they are asking BEFORE you go to the answers.
Good luck!
Forgot to add, I'd be leary of ever picking an "all" or "never" answer
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