Just got my Bristol notes on Monday (except the flight manual which is to follow) and have made a slow start. I am aiming for a couple of hours per night during the week and 5-6 hours over the weekend. I will read it all once, and then re-read at a later date making sure I can remember the key points. Like others, this may change as I get more into it though. I have a strong interest in the subject matter and want to learn it which I think helps, although I am sure there will be times when I will feel like throwing them in the bin too. Keeping a perspective and an eye on the bigger picture may help.
Nice to see I am not alone starting the long hard grind, a bit of moral support from others in the same situation can often help.