I find the investment in writing is like developing an athlete. You need to find experts, lay out a training plan, run with others, get advice and help from others, and continue to pace and develop your skills. Writing is like running.
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The SCBWI conferences, intensives, meetings. and critique groups are my writing marathon training plan. There is an event for every level of need in your development plan. http://sfnortheastbay.scbwi.org/
For my running, I’m a member of San Francisco Road Runners Club. And it’s only with commitment to both writing and running that I will see improvement.
Why should writing be any different than any other athletic sport?