Live for today! What makes you happy is your purpose. Although discipline is what it takes to achieve your goals, life does not have to be monotonous. Growth necessitates achieving new heights, new levels.
Say, for example, you are learning the piano. Monotony would be playing the same song over and over again until it's perfect. Sure we can say that's growth because the performance is improving, but we are not called to be perfect we are called to be ourselves.
If moving to learn the next song fills the heart with joy, then do it. We are perfect fractals of universal spirit with unique ambitions and passions that tie into our visions of a perfect life naturally.
Notice how the vision of what we want from our lives and the unique talents we possess tend to align. If you want to see this for yourself, then write two lists one on each page, one column/page your aspirations (what you want from your life) and in the next column/page what your talents are (where you are naturally talented).
Life is perfectly designed. There's a reason why fulfilling our unique purpose gives us the life we dream.
"And now that you don't have to be perfect, you can be good." - John Steinbeck
Be you! Everybody is waiting for it so they can be themselves. Today is your day; Carpe Diem!