Private transfers from-to Naples airport rail station can be arranged (up 3 pax 90euro, 4/6 pax 140euro, up 8 pax 165euro, 9/12 pax 200euro, 13/18 pax 290euro travel time from Naples to Praiano about 90 minutes)
By car from ROME take AUTOSTRADA A1 and then A3 taking exit Castellamare di Stabia (which is the first exit after Pompei), then follow the signs to Sorrento-Positano-Praiano ( from the end of the A1 in Naples-Caserta approx 90 minutes )
AUTOSTRADA A3 Sa-Rc to Salerno, then onto the SS 163 (Costiera Amalfitana)
From NAPLES airport the CURRERI coach company offers connections to & from Sorrento, in alternative from NAPLES you can also take the local CIRCUMVESUVIANA private train to SORRENTO (1hr) & then the SITA bus to SITA bus to Positano, Praiano and Amalfi (approx 90mins ask the driver to stop you at the Continental )
there are regular trains to NAPLES and SALERNO (approx 90mins)
From June to September there is a direct bus service (Marozzi) from Tiburtina Station in ROME to PRAIANO.
There are also direct bus services (Curreri & Marozzi) from ROME-SORRENTO all year round.
Public transport is recommended as PARKING is at a premium on the Amalfi Coast, however PARKING is available