Did my Mod 2 subjects pretty much full time. Had to resit PoF, mainly due of a combination of laziness and arrogance on my part.
Tended to do a couple of hours of study in the morning, then take a break to do flog myself in the gym, usually followed by a pint and a sandwich at my local. Pop back home, do another couple of hours, followed by a hour of relaxation in front of the telly, then a final 1-2 hours to review the ground I'd covered that day.
I found it useful to go over old progress tests regularly to prevent all the knowledge I'd gained being lost prior to the brush-up course and the exams.
Advise working your socks off during the brush-up fortnight, heavily biasing your time towards the feedback handouts they'll weigh you down with.
Not the most exciting 3 months of my life, but it got me through and I got through it.