As a driver or as a passenger? Either way the answer is that it will be very difficult if you don’t already have one. Drivers especially make so many trips that the chances of keeping a perfect rating over and over again becomes extremely small. As a passenger, it’s all about respecting the driver and their car. Have a profile pic that looks like you, be ready to go when the driver gets there, don’t slam doors, don’t eat or drink food in the car, don’t track mud in the car. If the driver wants to talk, then talk; if they don’t, then don’t. Being a 5.0 passenger is all about being empathetic to each other, which is good advice generally I think.