Practice in class is different from performing or auditioning.
Practice is where you train your mind to do your acting. Learn to train it properly. It will give rise to good habits.
Always put yourself first, your fellow actors second, and your teacher third. The experience should be yours.
By looking after yourself, so you can act your best, you fulfil being a good scene partner and a good member of the collective art form that is movie making. Being nice and wanting your partner to like you doesn’t help the scene.
Of course, you are professional, respectful, and appreciative of one another’s work. That is the expected norm.
Use class to practice small parts of your work. We grow in little bits. Step by step.
Try not to draw any conclusions after experiencing good work. Resist the urge to remember what you did. The experience is in you. Keep going.
Just showing up for class makes it a good class, so there should be no need to impose your will upon it. That’s a path to working too hard.
As far as breakthroughs go, they come after repetitive proper practice and then – Wham! You assimilate something. A breakthrough.
You can’t set out to have it.
The best routine as a professional is to practice, audition, shoot, and then come back again to practice.