Ideal Mindset is pretty comprehensive and would be a good intro, I think, into paraliminals for the purposes you have described.
I think how you change will have to do with your own situation. It's personal. Some things can change quickly, other things take a longer amount of time. No one can give you a real answer, Mindsurfer, in terms of time and effort because we don't know you and your situation.
You might also want to take a look at the Natural Brilliance program and compare the two, to see what is right for you.
Thinking on it, if I had to choose, I'd pick Natural Brilliance. It isn't just a set of paraliminals but outlines a very interesting approach to handling sticky problems of a recalcitrant nature. It's pretty good.