I'm doing around 2 hours weekdays and 3-4 on weekends... I'd really love to do more than that but time is hard to find... although now there is no more school i have all the time i want... looking forward to getting 6 hours in for most days post HSC... I generally split my practice into the first 2 hours being technical (split into around 50 minute segments) and then the rest will be work on things like pieces or improv... i tend not to work on pieces that much... dont see the need unless there are some psycho fast passages... btw i'm a trombone player... there was a period where i was doing 4 hours almost straight for about 2 weeks (during the holidays) every day... it felt awesome... pity i cant find the time anymore... Good for building up stamina which you really need when playing loud rock, jazz and latin stuff...