To potty train your pet rabbit, you can start by designating a specific corner in their enclosure for their litter box. Place hay in the litter box, as rabbits often go to the bathroom while eating. Additionally, clean up any accidents outside the litter box promptly and place the waste in the litter box to encourage your rabbit to use it. Consistency and positive reinforcement with treats or praise when they use the litter box will help in training them successfully.