i just break it down and it varies on how much free time i have...
on some days ill have coursework, rugby training, gym session w.e
and so i cant do much except spend half an hour messing around...
other days i have very little, and so ill watch tv or go on the computer, while holding my cards and just practice passes, egos, hotshot cut w.e anything that i can do subconciously...
i then go and sit down and just practice for about 45 mins, all the tricks on my 'list' atm... (it has sections with stuff that i need to practice for coins, cards and other etc) which require my full attention, eg ACR, Bound, Tivo 2.0 ghost gaff tricks etc, and then 20 mins flourishes like the WERM, Card shoot, molecule 4 etc...
anyway if i break it down, i usually learn a move faster than practicing for hours on end...