The easiest is by train to Newark and there should be a NJ Transit bus (#78?) from the Newark station that stops at Harmon Meadows Blvd. Check online with NJ Transit for bus routes/schedules and also with your hotel to see if they run a shuttle bus to the Newark or Secaucus Junction train stations. By train from JFK take the Air Train to Jamaica LIRR, LIRR to Penn Station and then NJ Transit or Amtrak from Penn Sta. to Newark. NJ Transit stops at Secaucus Junction.
The easiest is by train to