Create a system for how you organize your patient care, and follow it. Ask other nurses how they organize their day and cherry pick the bits that work for you.
As an example (what I helped my last student to create):
Step 1: Report (Patient A, Patient B, etc)
Step 2: Safety check -- introduce yourself, lay eyes on each patient, identify urgent needs (patient A, then patient b, etc)
Step 3: Start your rounds. Vitals, meds, assessments for each patient in turn, starting with the patient with the most urgent needs.
This is an example, and maybe wouldn't work for you, but if you always do things the same way, when you inevitably get pulled away by something, you know where to come back to and you spend less time worrying about what to do and more time doing it.