on Jane Friedman site:
Every writer I know who has lasted in the publishing industry for more than five years has one thing in common: a support system that functions on multiple levels. Everything about this industry—querying agents, sending stories out on submission, the erratic way in which we get paid, etc.—is designed to weed writers out and wear us down. But those of us with multi-level support are more likely to weather the storms of self-doubt.
There are three key types of support for writers: