I wrote for years before I was ever published, and I don't think I could ever stop. That said, I was also a veterinarian before I sold my first book, and I still volunteer my time to help with animal welfare causes. So that is a career I would be happy to return to - while still secretly writing strange stories back in my doctor's office.
For some reason, some of my best solutions and ideas are triggered in those dark theaters, usually totally unrelated to what's going on onscreen. I also enjoy hiking in the foothills and mountains close to Sacramento. I always have to bring a pen and paper to jot down sudden thoughts and ideas. So inspiration arises from countless sources.
I do have an office where about 70 percent of my writing gets done, but sometimes it does get a bit stir-crazy to be cooped up in there, so I'll grab my laptop and write somewhere else: another room in the house, out on the patio, or even Heaven-forbid, a trip to Starbucks. But I also write on the road.
I don't actually have a one wellspring of inspiration. Though I'm most often inspired while reading - both fiction and nonfiction. I subscribe to National Geographic, Scientific American, Discover, and a slew of other magazines. And it is while reading articles for pleasure and interest that an interesting 'What if?' will pop into my head.
I've mis-signed many a book Rollins or Clemens. My readers quickly become aware. Booksellers will often promote me under both names, and I do plug both at signings. Generally, the fantasy reader has no problem going into the suspense genre. It's harder for the typical suspense reader to go the other direction.