If you are a buget traveller
-try staying with the locals or in hostels on arrival, instead of prebooking a hotel.
-get a room as close to the beach as possible so you dont need to rent a bike
-do not eat food from the shacks on the beach, buy or order it before getting to the beach.
-carry a medical kit ALWAYS. It is difficult to find a doctor or clinic around the beach areas.
-North Goa is for Partying with frnz and strangers.... South Goa is quiet and relaxing for family trips.
-try to explore hidden beaches if you are in adventure mood, like butterfly beach, cola beach, sunset beach, benaulim beach etc.