How about telling yourself that you will get better again? There is research indicating that our bodies and minds respond to messages like that. Just one example: people with pre-cancerous cells who say "I'm sure I'm going to get cancer" are more likely to develop cancer than those who say "It's not cancer. I'm not going to get cancer. I'll just keep an eye on it."

One study found that people who wrote down 5 things for which they are grateful each day exhibited a 25% increase in subjective level of happiness after 3 months. Subjective as in their own self-report...how they felt....which is all that matters, right?