Today there are so many great options, so the most difficult thing is not finding good resources, but sticking to the one you choose until the end.
Whatever you choose to study and follow, you should stick to it until the end, practicing what you are told to do. Of course, to be able to do this, you need to choose wisely. If you think that Intellipoker is too basic, or if you need more advanced stuff, just drop it and find a new course.
But do not study a little bit here and a little bit there, changing all day what you study.