It seems that finding your optimal sleeping time in between Kripke’s finding is a good way to go. It’s certainly something I’m giving a go now. He does say you

It seems that finding your optimal sleeping time in between Kripke’s finding is a good way to go. It’s certainly something I’m giving a go now. He does say you need to experiment and not take it as gospel. But there's nothing particularly new in that article, I've heard that story of Japanese office workers napping at their desk in the afternoon many years ago.