i think when you ask of how often do you practise is not measured.. you should set a goal first. when you want to learn a particular technique focus on it so you can have a good quality playing ,then move on to another tech..

if you are crazy with guitar and the responsibility you have is your self then you can play all day long even night. if you have family and that crazy for guitar then take your free time to practice but remember the responsibility...

doesnt matter how often you practise but how you achive a goal in every practice even if time is against you. want to learn fast practist a lot more if not take your time hehehe.

im currently drunk so sorry for the wrong grammar and spelling.hehehe