Dig holes around your villagers that are outside, fill your pockets with stacks of 100 Bells and make sure you are carry nothing but the Bells. Go swim in the ocean and idle (not move, don't close anything and leave game open and running) for 7~10 minutes and run around and see what villagers ping you. If one pings you, talk to them. They'll either say something pointless, ask for a greeting or new catchphrase or suggest a PWP. If I recall correctly you can only get one PWP a day, but you may be able to get more than one a day but the second one may be much rarer to come by.