As long as I focus on what I feel and don't worry about where I'm going, it works out. Having no expectations but being open to everything is what makes wonderful things happen. If I don't worry, there's no obstruction and life flows easily. It sounds impractical, but 'Expect nothing; be open to everything' is really all it is.
Some writing is a really nice solitary process, in a way, because you can be a little self-conscious around other people. If it's just you, and you're at your favorite piano, or whatever instrument, and you feel comfortable, then somehow, I always feel like it's opening a door and letting whatever is to pass through pass.