I dedicate one hour to practice, more or less. My practice routine (daily):
– starts with index drill and some bow movements (5 min)
– scales (10-15min)
– etudes: Wolfhart n 13 and n 31 (now) over 20 min
– piece the rest of the time. My teacher gave me several pieces to work on for the summer holidays, so I started with the new one, practicing slow the most difficult parts. After that I try to play it without stops. And last thing I do is to play one or two time the pieces I already learned and practice the days before.
This is my ideal scheme 🙂 . If I don’t have enough time, I reduce all the times.