Hello everybody,
my 5 ( no - 2 ) cents for this thread.
I do actually recommend Czerny and Hanon etudes only to those pupils ( students ) , who as I see or believe, are really able and
want themselves to practise them regularly. I don't know anything more boring than these things. Nevertheless, some ( honestly, very few ) do really play them regularly , without any pressure from my side - then it is Okay.
Though, as I believe, these etudes are not really great help for some modern techniques - that is, if you are to play smth. from Gershwin, or any other piece having complex chord structures - you can as well forget about Czerny.
For me, a good alternative are the Inventions of Bach - all of them; well, actually not only inventions. To play and exercise these things is a fun in itself, and it brings really good results, as I can see.
Scales and arpeggios? Can't imagine how can anyone warm up without them. It is just a MUST...
Concerning Liszt ( to OverFjell ) - well, I believe, each of his pieces is a study in itself. I would try to exercise the most difficult bars separately, say 4 bars in a run, left hand - right hand, at different speeds, and by heart anyway. That is, if your general level is ok for the piece, there is nothing impossible.
Btw., rojo ( and others interested ) - I have recently discovered a wonderful exercise for a warm-up, based on so called Brahmsübung ( chromatical runs ). It was re-invented and complemented by Jordan Rudess ( piano & keys by Dream Theater ) . The thing is absolutely great - can get your fingers from 0 to 50C in 5 minutes! If interested, i can try to describe it , or post here scores ( only don't know how to do it - as a PDF? ).
Cheers
Andrew