Every morning I would listen to one or two subjects. At lunch time I would do the related exercises. If I had any trouble – I would listen to the subject again the next morning.
When I finished with the PrepCast I signed up for two months of on-line practice tests. I kept taking individual subject matter tests and once a week took a general full test.
I forced myself to stay focused by scheduling my exam when I started with the practice tests.
I passed on my first try.
Good luck