I think I stole this idea from a tweet by Matt Homann. In which case, hat tip to him.
Another way to keep perspective, and also a good business planning tool:
1. Make a list of the things your clients should expect of you.
2. Make a list of the things you should expect from your clients.
3. Use them to keep you on the right track.
4. Now that you're using them, why not show them to your clients as well? If you make yourself accountable to them, they won't mind being accountable (in more ways than one) to you.