I feel the real message of the article/letter is to take better care of yourself. No project is worth ending up in a situation where you feel life is not worth living, and while software and other computer things are cool and for most of us probably both work and a hobby, it's important to take a break from things.

I know I would go absolutely crazy if I could not go outside to do things like ride a mountain bike, eat some ice cream or simply just not sit in front of a monitor every day.

If you are feeling stressed, take a break. :)

Edit:

I know it can be hard, and I know people who suffer from depressions can seem perfectly fine.

A girl I went to school with recently killed herself, much to my surprise, as through my very limited contact with her these past years she seemed very happy in a relationship and about to finish school. The next thing I know she had ended her life. Depression is not something to be taken lightly.

I wish I had known, and I wish there was something I could have done or said.