From someone who avegages low 8 I would say 3 things.
1. Get a good clock
Hardware is pretty essential in clock. I would suggest a lingao with Rubik's clock pins.
2. Practice accurate turning.
I will often sit down and practice accurate turning do when I am solving I can confidently go fast. Pretty much just practice all 12 possible turns on all the different clocks. Also practice rotations of the clock.
3. Practice
Practice is really the best way to get better at clock. Also while practicing make sure that you experiment and try to find ways to solve the clock more optimally.
Good luck with clock!!