I'm a firm believer that, in order to put things in perspective and evaluate life, you need to walk away from it. You need to pack your bags and travel somewhere else. By completely removing yourself from the situation and "forcing" yourself to relax, you find that things aren't as bad as they seem.
For me, the epiphany that the man I love no longer exists -- and subsequently, that I need to stop talking to him as if he and I are still happily together -- came within moments of arriving at a South Carolina beach. Perhaps therapists should encourage this type of session, rather than reclining on a couch and talking to a wall!