I Play Piano

Get "The Complete Book of Scales, Chords and Cadences" it's a scale book that is absolutely amazing. Then just warm up by working on scales, then do your song, then woodshed some more scales, the goal is to be able to play the scales in crotchets (or all state pattern) for two octaves at 180 on the metronome, meaning you want to be able to play them at 200 on the metronome so 180 feels easy. They're always gonna be boring, trust me though when I say they're worth it. Besides, eventually you only do one scale exercise a day to warm up after you got them all down amazingly. And remember arpeggios are just as important as the scales themselves!

Also, you could always learn La Campanella (which in my mind is literally just one extremely long e minor scale exercise)

And The Ghost Ship is a variations on scales type piece (though it's extremely difficult)

Heheh, first and third page = no problems, though I have troubles with the section in-between (mostly just because I've never really practiced it lol)

I'd love to hear it someday....