I'd be concerned that journals reflect the real world too much and might mess up your NCLEX answers.
Seriously - the NCLEX requires a very discliplined way to answer. Typically, at least 2, if not all 4 answers are "right" or at least can be justified. On the floor - protocols, procedures, policies, providers, patients (and sometimes just the mood of the day) can vary so much. On the NCLEX, not so much. The NCLEX doesn't reflect reality - it reflects a perfect, pretend reality that ensures you can critically evaluate and exactly respond to a given situation in a prescribed, detailed manner.
I had 4-5 NCLEX books. And notecards. But I'm a total nerd.
That's just my 0.02 tho.