Like rusty11, I've got a job that leaves most of my time here (I'm at work now) free for me to do pretty much anything I please, while earning a pretty good income. So I can spend a few hours a day practicing as well.
I don't know how you can practice 'card skills' for 8-10 hours a day, I'd go mad for sure. I flick through a deck a few times (no more than 20minutes usually), then 'play' on the BS trainer from this site for a while, then I surf the net for a while. The most I've ever practiced 'card skills' for in total in one day would be 4-5 hours, with several breaks in between shorter sessions.
My personal tips for being able to count at a decent speed are:
1. Whenever you have spare time count through a deck (or multiple decks if you want) with the cards face to you, just push them across with one thumb into the other thumb/hand as you count. Don't aim for a super quick count through time like 12-15 seconds for 1 deck (I think anything around 25 seconds is ok), because this is not a contest to see who is the quickest, it is a drill that over hundreds of count-throughs will imbed in your brain the values of cards etc and it will make it almost a subconscious process for you to see a (in hi-lo) 7 as neutral, Ace as -1, or a 2 as +1 for example.
2. A variant of the above drill that I designed (yes I know lots of other people probably do it too), is to get a deck and have an empty desk/table in front of you. Just deal out 'hands' of 2, 3 and 4 cards randomly onto the table, face down until either the desk is full or you run out of cards. Then just go along and pick up the decks one by one and count them as you go. This drill is on the same principle as the first one, you get to recognise different groups of cards for their values as a whole, which speeds thing up considerably.
Hey rusty (or anyone else), have you come up with any ways to put all this free time we have at work to use to make money? I have my own laptop and internet connection, and while not all my time at work is free, I'd say about 80% is. Surely there is something that I can do to help save for the Porsche, other than learning to count cards, which doesn't have good prospects in Australia.