Updated list

1. When you do go to the piano, you have no time to pick up bad habits as you fumble about trying to find the right notes.
2. You can begin working on musical interpretation right from the start because you understand how the passage fits into the larger whole.
3. It is good for general musicality, which is important to me, being a student of composition as well. It sharpens your inner ear and attention to musical detail on a page.
So, being a fan of lists, I decided to try to compile a list of all the different ways one can practice a piece without actually taking it to the piano. My goal in mental practice is to get as good as Gould was - to the point where a piece is mastered except for the most technically difficult moments before I sit down with it at the piano. This is no simple feat! So here are all the ideas I have either gleaned or come up with on my own - I invite you to add more if you have them.
1. Listen to as many recordings of the piece as possible. Make a copy of the score specifically for noting differences between recordings, and pick a color for each recording and mark on the score the different things that different performers do.
2. Write in all the fingerings on your own. If fingerings are provided, review them and consider other options.
3. Input the piece into a notation program. You can play it back at various tempos. I use a practice regimen that involves taking small sections of the score and playing them back at first very slowly, hands separately, completely and fully visualizing the geography of the keys being played. Then I gradually speed up and combine hands, but only at the speed at which my mind can keep up.
4. Do a full harmonic analysis of the piece. This works for any piece up until probably French Impressionism. Then you have to get creative with your analyses. For example, you may have to start labeling chords by their 'absolute' names (for example, Cm/eb) as opposed to relative names (i6/4). The goal of a complete harmonic analysis of any piece is that it fully explicates and accounts for the existence of every note from a harmonic theory point of view. I have more thoughts about effective analysis of later music for pianists, but I will save them for another time.
5. Do a full formal analysis of the piece. Look for the overall form, and the forms within big sections. Attempt to find relations between different keys used. Try to find patterns between lengths of different phrases. Fully explore all the different motives and constructive elements – in effect, de-compose the piece, attempting to figure out how the composer created it.
6. In the ‘naked’ score that you created in step 3, extrapolate all dynamic, tempo, and expressive markings. Use different colored writing instruments for the different types of markings. Pay special attention to ‘surprises’ – markings that you might not expect to be there, and try to explain their existence.
7. Make another copy of the score and “orchestrate” the piece. Label the different lines with different instruments. Distinguish between solo and tutti sections, and determine how much of the orchestra would be playing at any given time based on dynamics and character.
8. Put some good focus on the rhythms in the piece. Grab some sticks, some spoons, or whatever, and drum out any rhythms that seem interesting. Try to ingrain them into you, for it will make for a more meaningful performance in the end.
8. (My favorite) Learn to sing each individual line in the piece. This is especially effective in Bach and other contrapuntal music, but it is useful in any music with a melodic line. Try to solfege it! I’m weak in this area so it’s good practice. This also gets your mind off the fingerings and allows you to focus on the beauty of the line. Memorization of all the melodic lines to the point that you can sing them given the first note is the sign that this step has been mastered.
9. If the piece is programmatic, or based on something else, get to know that something else. If you’re playing a theme and variations, find out where the theme came from. If you’re playing Ravel’s Gaspard de la Nuit get to know the poems intimately. See if there are any moments in the piece that correspond to lines in the poem. (Although if you’re playing Gaspard you probably don’t need this list. )
9. On a separate sheet, write out your practice plan for the piece. This is mental practice too, because ideally, your practicing sequence should start with the most difficult sections of the piece and be based on the form and construction of the piece itself. Be specific. Know the exact order in which you will go. Bernhard’s 20-minute practice session regimen is incredibly helpful, if not indispensable, in this step.
10. Take the score and conduct the entire thing as though a pianist (or a choir/ensemble) would be sitting there playing it while you conduct.