One of the biggest mistakes we make as professionals is to make ourselves as available to our clients as possible. It's a natural part of our desire to be seen to be providing excellent service. It's even more tempting when the economy is down. We agree to 'out of hours' meetings, we move personal appointments to accomodate our clients, we provide every email address and every telephone number where we can be reached - including the hotel where we're staying on vacation ("just in case something crops up"). I've done it myself, and I even justified it to myself commercially: that call at 10pm on a Friday could lead to more paid work.