If you want to get better at something practice everyday. I will not say practice makes perfect because I don’t believe in perfection but it does make you better.
Lets take magic. I think of magic like running. Even if you are born with an amazing talent for running that talent will only take you so far and only when you practice and hon your skills will you be a truly amazing runner. Following this thought if you want to improve your running you would set up a practice scheduled you might not practice the same thing or do the same run every day. You may run stairs one day and track the next day and then the next a trial, but every day you work on it. You do something to make you better.
Magic is the same way. You may or may not have been born with talent, but to be truly amazing you must hon your skills. You must practice. You must study but you must practice. If you want to get better with casting a circle. Cast one. sit in it see how it feels. examine it to make sure it is strong. The next day cast another, the next day another. Keep doing it until it feels natural to you, until it hums right. Once you have the hang of it and it feels right, you have to keep up the practice. Maybe not every day but often enough that you can keep up the feel of it being natural. If too much time has passed it often feels like you have to force your concentration as opposed to being in practice and it all just coming to you.
This might sound intimidating but it need not be. Honestly you can cast circles and hold mini rituals in a matter of minuets.