I’ve often heard creative folks claim that producing art quickly or in bulk leads to lower quality.
It’s not true.
Creativity is like a muscle. Use it more, make it stronger.
Yes, muscles get tired. When’s the last time you spent so much time in creative pursuits that you were in any danger of creative burnout?

I just spent February writing 25 songs besides working on my novel and writing here and at my personal blog. Being more creative leads to being more creative. I’ll be physically exhausted long before I’m creatively exhausted.
Quality? Sure, some of the songs I wrote aren’t keepers. That’s the nature of the beast: not every song is. But when I write 14 songs in a month, 3 or 4 are excellent. When I write 25 songs in a month, 7 or 8 are excellent. Not only more excellence, but a slightly higher percentage.
I believe that if I wrote 100 songs next February, I’d create 20 or more that were as good as anything I’ve ever written.
Are You Not a Writer?
The first thing writers tell me when I say “blog weekly, two or three times if you can” is “I don’t know what to write about.”
You’re a writer, aren’t you? If the goal is to get people to part with their money for your writing, how about showing them, often, what you’re capable of?
Wrote a nonfiction book? Blog about all the stuff that didn’t make it into the book, about everything you’ve learned since it was finished.
Fiction author? Easy: make up new fiction. No, I didn’t say write a batch of deathless prose every day. Just write.
Blogging regularly is not that hard—you’re a writer.