Shamelessly pinched from Melissa:

What have you made multiple attempts to learn, but just haven’t been able to master?

How to read music and play the piano. I have some musical skills; I learned to play the guitar fairly well, and I have been accused of singing well enough to get into a couple of college musicals, but the intricacy of sight-reading music eludes me. It’s too bad, because I have inherited my grandmother’s 1928 Mason & Hamlin baby grand piano and I would love to be able to play it well.