This includes ensuring you have a backup plan that doesn't rely on other people or outside factors--only on your plans and hard work.
If you're struggling with burnout, it's essential to consider the consequences that quitting might have. Most artists can only quit because they make a living from their art which is not always true.
Some artists choose to quit their job, but if the work is not getting enough interest from the public, it would probably be best for you to continue rather than give up.
You might think that sales are low and don't return how you want them to, but it isn't an absolute lack of success out of the question.
To succeed, you need to find a niche market that exists in a market lacking competitors. Even if you have low sales, there is still a chance for success.