2) Keep the nose aligned with the runway centerline using rudder. Again, pretty straightforward.
3) Maintain the runway centerline using aileron to move the plane laterally. Nothing especially hard with that, either.
Eddie, I struggled a bit with this. I'd done quite a bit of practice on maneuvers before we started working on landings, and it was already an engrained habit to apply right rudder and right aileron at the same time to stay coordinated. (It feels the same as weighting a footpeg and pushing a handlebar when leaning a motorcycle.) On landing, of course, it's essential to divorce rudder and aileron controls and use each sort of independently.
SO,.... When I realized I was having trouble with this, I asked my CFI if we could spend some time at altitude doing slips just so I could get more accustomed to using opposite rudder and aileron. We spent a while slipping both directions, then went back to the airport and did a few landings. It helped.