William Gray Harris
"Very few people know how to work. Inspiration, everyone has inspiration, that's just hot air."
American Potter, Artist
1893 - 1998
I have often heard beginning writers say that they only write when they are inspired. Unfortunately, if they wait until they are inspired, their output will be very small. Most experienced artists and writers know they must work whether they are inspired or not. Often when we work the inspiration will arrive on its own time and when we least expect it.
Success comes from work. Work when you are sad. Work when you are happy. Work when you don't feel like it. Work when you want to go to a movie. Our minds are very good at finding excuses for not working. "I have to do the dishes." "I have to wash the clothes." And the list goes on. Work takes discipline and will power.
See writing and painting as a job that you need to show up to every day. Since you have no boss but yourself, you have to hold yourself accountable. Schedule your hours when you are most creative and stick to your schedule. Maybe you write between 5 am and 6 am. Or if you have the luxury, schedule your work hours from 8 am to 5 pm with an hour off for lunch. Some writers write in the morning and do their research and marketing in the afternoon. You have to find the schedule that best fits your temperament.