The problem I run into when learning from Card College is that Giobbi gives you SO MUCH INFORMATION.
This is an issue with the books sometimes, but it's an issue of choosing to slow down and work on one thing at a time, in my opinion. Often we get a source, be it a book or a DVD, and we want to do everything on it. We want to get it as soon as possible, too.
This enthusiasm is a good thing, but why are we like this? If I had to guess, I'd say it's the novelty of the new. We like having something we didn't have before, especially when it's the new thing, and we like being the first one to have it. It's why movies rarely last more than a couple of weeks in the top spots...people love being the first in line, but once the novelty wears off, so does the enthusiasm.
If this is the issue, as it has been (alright, sometimes still is) for me, try this. Pick one thing Monday evening. Read through it Monday night, walking through the moves and whatnot. Break it down. Then Tuesday, try to go through it without the book. If you get stuck, refer to the source. Try to get through it several times without looking. Wednesday, work on your script, and practice without looking at the book. Thursday and Friday, run through the routine with the script. Edit, edit, edit.
In one week you'll have dusted off a new routine and will have begun to polish it. You'll also have prevented information-overload.
Good luck...happy reading!
Pj