A 58-year-old patient reports waking up three times during the night to void. After reviewing this information, what is the best initial nursing action?

Encourage the patient to keep a bladder diary to track fluid intake and voiding patterns.

Recommend immediate use of anticholinergic medication to reduce bladder contractions at night.

Advise the patient to limit caffeine intake during the daytime to prevent nocturnal voiding.

Instruct the patient to restrict all fluids after 6 PM to reduce nighttime urination.