Books On Musical Instruments
Read and learn about musical instruments. As serious as your interest in the piano may be never isolate it as it is only one of the instruments with which you could be making music. The piano is one of the most popular instruments and its versatility allows pianists to play more repertoire, even transcriptions of symphonies. But understanding other instruments will also enhance your understanding of the piano and its context in music. You might also want to consider playing chamber music with violinists, cellists, flutists, clarinettists etc or Lieder with singers.