I have an inner gage when I feel it's too much, then I just don't do a particular film. I'm lucky that I get more offers than I can possibly take. But I always want the phone to be ringing, because I want to do this for the rest of my life. I don't plan on slowing down, but I certainly have to say "no” more and more. I consider myself very lucky to make a living at this. It's almost bizarre for any musician to turn down work as much as they to have to keep themselves sane. I know what my limit is. And I keep myself at that limit.