Not sure where to start listening for lineup preparation. I have a feeling the same problem will occur when I'm actually on the farm, though.
Have you gone before? Not trying to be condescending, but what works for me is deciding on my schedule beforehand, regardless of painful conflicts. Half-sets suck.
Don't worry about it, last year was my first year. I know that when the schedule goes out I will be planning my route. I'm just saying as far as the next couple months are concerned (before they release the schedule). I have a strong desire to want to go for the Macca pit so I'm just holding out hope that the main stage is full of some other acts I'm looking forward to. That could take away the pain of missing some others if I do end up deciding on that.
6/12: Rolling Stones 7/3-5: Fare Thee Well 7/11: Judas Priest 7/18: Tyler, the Creator 7/20: Manson / Corgan 7/23: Failure 7/30: Faith No More / Refused 7/31, 8/7-8: MMJ 8/15: Neurosis 9/17: Chelsea Wolfe 10/3: Run the Jewels 10/7: Alt-J 10/8: Ghost