Motivation is quite an important thing for someone to have; there are people who over come great adversities just because they had some motivation. This applies in all walks of life, not just to artists but even every one else on a daily basis. For a person to lead a good life, they need to have a plan that they follow. It could be their work, family or both and these are what keep everyone focused –or at least they should.
If you are looking to go far as a writer, one of the few things you need is a better source of inspiration – money should not be the main objective. Not all artists are lucky enough to have a muse, but you should still look for better motivation than the payment. The value of your work as an artist should be measured by the number of people it helps. But then again! Only you can make effective decisions when it comes to your life and career.