Motivation gets you started, habits keep you going. This is true for every serious endeavour you will pursue during your lifetime from writing a book or starting a business to getting married and having kids.
Habits, the repetitive, boring activities that you have to do every day in the direction of your dreams are the keys to spectacular life.
Your feelings will not matter if you develop the habits that will help you get the life you desire. With habits, you simply write, workout, invest and network daily, not because of how you feel per time but because it’s what you do everyday on your journey.