Valentina Lisitsa, being Russian trained, undoubtedly experienced 8 or more years of rigorous foundational piano tuition from top Russian teachers who would have given her sound advice both musically & technically.
By the age of 15, students in this situation have usually mastered all the significant piano repertoire & spend subsequent years mainly refining their interpretation. In addition, such students acquire extremely good facility & a fast tempo in all the various piano scales,arpeggios, etc during this early training, as well as having frequent exposure to performance opportunities in various capacities.
Also, by her own admission, Valentina developed her own style of piano technique in addition to her early training. On observing her playing, it is obvious that she has extremely well-coordinated movements of fingers, hands, wrists & arms at the keyboard, as well as having eliminated all unnecessary tension in her performance, not to mention the musical insight she also demonstrates. This coordination & freedom in piano playing can be achieved partly through reading & observation of the sources I mentioned above, plus with the help of a good teacher. Also read my post on fast 8ves, as some of this knowledge is contained there.
I don't know what level you've reached in your piano playing, but you have to firstly do the ground-work with a knowledgeable mentor. This involves playing a lot of baroque works starting with movements from Suites, then Bach Preludes & Fugues, then classical sonatinas & sonatas, plus Chopin Preludes, Nocturnes, Ballades, Etudes, not to mention all the other romantic repertoire of Schumann, Brahms, Schubert, Liszt, Rachmaninov, etc as well as concertos & many modern pieces. Only then, unless one is a genius, would the calibre of Lisitsa's playing be achievable, given that one has a fair degree of natural aptitude to begin with. This doesn't mean give up. Superior piano playing is the result of many years of focused application & study with the right teacher. Reading & observation can enhance, but not replace, this.