Just like Mattgic and MaXim, I don't practise per se, so it's very hard to put a time schedule on it. But I have cards in my reach form the moment I wake up to the moment I start sleeping.
So I just don't think about it anymore. ITs gotten to a point where I am comfortable with the deck in hand, flourishing without looking, any thing really. Its a bit like a second nature to me.
My advice?
Ignore your question, and the hundreds of answers bound to come. Just keep a deck of cards in your hands and live life with it at your side.
Like Steerpike and Sam have (tried

) to say, Its not about putting a time schedule on it. Live life. Try to have a deck in hand for as much confortable time as possible, in the bus, the train - anywhere. When you go perform, perform!
Then go back, sit there, absorb advice - and keep practisin'
Gustav