Updated: Jun 25, 2019
Everybody has their own way of practicing technique - you can play etudes targeted towards a specific aim (i.e. octaves, left hand agility, staccato) or simply pick the difficult passages of the piece you are working on and build your own exercises from those notes. Check out my rhythmic exercises in my Instagram highlights called: Practice Tips for a few examples. For etudes you can check out:
• Beginner / intermediate: Hanon, Czerny
• Intermediate: Moszkowski, some of the Chopin Etudes.
• Advanced: Chopin, Debussy, Liszt, Rachmaninoff, Stravinsky, Brahms, Ligeti.