I find kaplan's qbank and lacharity's prioritization,delegation, and assignment the closest to the nclex questions...sometimes i find kaplan's questions much harder than the nclex itself. as far as second guessing,well, you just got to try your best. usually your first instinct is right, so go with it don't second-guess yourself. if you reviewed your material very well you are not going to have a hard time getting thru the nclex.good luck!!