Everyone has a well-defined routine when wiping their ass. Sometimes you need to wipe a lot, sometimes a little, sometimes the stream of shit seems to never cease.
Personally, before I start I put down a couple of pieces to float in the water to prevent Poseidon's Kiss. Then I use a dubious amount of TP to wipe my shithole, carefully inspecting the TP to determine if more wipes are needed. I utilize a number of masterful single-wipe techniques which are customized to my ass for maximum wiping efficiency and comfort.
How do you shit?