During a typical grooming workday, you'll see at least two stressors rear their ugly little heads. First, you'll be giving baths and haircuts to different types of dogs. The lab and boxer owners will probably be happy to have their dogs clean, so they'll be easy to please. On the other hand, you'll have the poodle and Yorkie owners who insist on a show-quality cut even though they're not paying for one. They don't want a hair out of place, and they'll probably want the dog's nails painted, too. Just realize the owners have some OCD issues, do your best, and move on to the next dog.
Speaking of the next dog, you'll be grooming multiple dogs each day. Although each groomer plans their day differently, you'll probably have dogs in different stages of completion throughout the day. While your bather is shampooing one dog, another dog will be getting his personal blow-drying treatment. You'll be finish-clipping and scissoring another dog before you give still another canine his final brushout.
Here's the point: You've promised each owner a specific pick-up time, which might not allow for mishaps that occur along the way. You don't have a bather? That means you have to wash the dog(s) yourself. If a dog freaks out with a cage dryer, you might have to hand-dry him, which clearly isn't built into the schedule. If a freshly groomed dog has an accident on the table, guess who mops up both the table and the dog? All these delays add up, sort of like a snowball crashing down a hill. At the end of the day, you'll have to tell the owner(s) why Fido isn't ready yet. Take a deep breath, squeeze your stress ball, and get ready to face the music.