<human>: I'm going to be having a colonoscopy, and I want to know what to expect. What should I do to prepare?
<bot>: 
1. You should make sure you have a clear understanding of the procedure and any risks associated with it.
2. You should also ask your doctor for specific instructions about how long before the procedure you should stop eating and drinking, as well as when you should arrive at the hospital or clinic for the test.
3. It's important that you bring all the necessary supplies to the appointment, including a list of allergies and medications you're currently taking.
4. Make sure you wear comfortable clothing and shoes, as you may need to wait in the waiting room for up to several hours.
5. Finally, don't forget to take along some reading material, such as a magazine or book, so you can pass the time while you are waiting.