Actually ideas are everywhere. It's the paperwork, that is, sitting down and thinking them into a coherent story, trying to find just the right words, that can and usually does get to be labor.

The advice would be the same for any kind of fiction. Keep writing, and keep sending things out, not to friends and relatives, but to people who have the power to buy. A lot of additional, useful tips could be added, but this is fundamental.

There's a big overlap with the people you meet at the fantasy and science fiction cons.

The Swords were still interesting but by then a cast of characters had started to appear and go on from book to book, and other things about the world began to feel constricting. And there were other things I wanted to do, so I closed the series up and stopped it.

I started writing seriously about 1960, at the fairly advanced age of 30.

The Berserkers have been with me for about forty years, and we're not done yet.

I suspect that writer's block afflicts mainly people who have some stable and ample source of income outside of writing. So far it hasn't been a problem.