It's not too bad. Per day, I spend about 2hrs on the concerto, 1hr on the Beethoven Trio, and I pick a Ballade each day to study. I have the difficult sections mapped in my mind and organise my practice around them. I tend to memorise them as quickly as a can - despite a couple of problems, I think I am technically well on top of my playing, and so this is not so much of a problem now as it was, say, a couple of years ago. The English Songs, the Sonata and the Bach/Rachmaninov are just practiced sporadically (not even every day) as in the songs I can rely more on reading, and the sonata/Bach are not needed for a couple of months yet. I'll also have odd days where I will just dip into/read through new repertoire, getting my fingers around it and working out a few initial fingerings for future reference. This allows me to absorb the music much quicker when I actually come round to studying it for real. For example, I have actually been studying bits and pieces of the Ballades for nearly 2 years now, ready for when I need them (which I now do!).