Fuel filter is inside the gas tank, not meant to be serviced.

For plugs, your car came with platinum plugs meant to last 100k, I personally woudn't trust that...I'd rather use copper and replace them more often, but that's just me. If you go the copper route, NGK (zfr5f-11) or Denso (kj16cr-l11) is what Honda recommends. If you do go with platinum, Honda recommends NGK (pzfr5f-11) or Denso (pkj16cr-11).