many pieces at the same time - how will I make it?!

[_chops]

  im playing: mozart k570 (the first movement and it's basically finished), mozart sonate k332, moszkowsky etude (n 11) and also the first movement of kabalevsky sonate op 46!!! I also would like to learn the first debussy arabesque.... and I have to learn (indefinate deadline) bach prelude in g major.
     At the same time I have to learn a lot of chamber music (but it isn't very hard and I don't need to "interpret it").
    How will I manage this? How do you manage? My concert is in february but I don't know how I should use my time for practising. I have like 3 hours a day but that seems not enough :/ How much do you practise on each piece and how do you divide your time?