1. You will receive a dog. You may love this dog or struggle with this dog, but this dog will be yours for the duration of your time together in agility.
2. You will learn lessons. You are enrolled in a full-time informal school called agility. Each training session, class, and competition gives you the opportunity to learn lessons. You may like the lessons or dislike them, but you have chosen them as part of your handler curriculum.
3. There are no mistakes, only lessons. Growth as a handler is a process of experimentation — a series of trials, errors, and occasional successes. The runs that go wrong are just as much a part of the process as the runs that go right.
4. A lesson is repeated until learned. Lessons will be presented to you in various forms — different courses, different environments, different levels of pressure — until you learn them. When you have learned the lesson, you move on to the next one.
5. Learning lessons does not end. There is no stage of agility that does not contain lessons. If you are still handling a dog, there are lessons to be learned.
6. “There” is no better than “here.” When your “there” — the next class, title, or championship — becomes “here,” you will simply create another “there” that appears better than your present “here.”
7. Others are merely mirrors of you. You cannot admire or criticize something in another handler unless it reflects something you admire or criticize in yourself.
8. What you make of your handling is up to you. You already have all the tools and resources you need — your dog, your body, your mind, and your time. What you do with them is entirely up to you.
9. Your answers lie inside you. Your dog is always communicating with you. All you need to do is observe, listen, feel, and trust.
10. You will forget all this. You can remember any time you wish.
    

I also recommend that you check out this Podcast Episode, where I share the Rules of Being an Agility Handler, and why it's important to remind ourselves constantly about it 

https://www.dogagilityperformance.com/podcasts/the-champion-s-journey/episodes/2149133158