You can steal my practice routines. Or anyone else’s. There’s no shortage of great ideas that work.
My bowings and fingerings are up for grabs too. Just find the ones that work best for you. There are only so many possible solutions, and most have already been “discovered” by others who have already travelled a similar path.
When it comes to the things that make your music and performances unique, it is futile to try and steal that. There is only one Heifetz, Perlman, Hilary Hahn, Darol Anger and Stephane Grapelli. And only one you.
Be authentic. You can riff on the work of others, but in the end people want to enjoy your uniqueness and your gift.