I didn't go through XJT/ASA training so I don't know exactly know what you should expect. But some advice I would give is when you start feeling like there isn't anyway you're going to get through all the material you need to know, and this will happen once or twice, remember that tons of stupider people made it through and are out flying the line. Then go have a beer, a bunch of us took our notecards to the bar and quizzed each other on memory items and limitations and had a good time doing it. Work and study hard but don't burn yourself out and you will be fine.