"Real" mental illness is, in many ways, worse than grief, at least as far as I can tell. With grief, even overwhelming grief you've got severe disability for a few years (usually 1-3) and then modest disability for a few more (3-5) and then lingering pain and memories that people come to terms with (no, they never "get over it," but they do reach terms with themselves and God).
But mental illness, the real kind (and I'm using "Real" above to emphasize that it is real rather than as "scare quotes" to diminish it) continues without benchmarks and often without clear resolutions.
Sure, you can do some things. You can get aerobic exercise, if nothing else, sneaking off to a local university or school track and running for forty or fifty minutes a day. You can regulate your sleep and engage in cognitive therapy.
But the medication is usually not perfect (they all have side effects), your body changes as you age (so what worked last year, may need to be adjusted next year) and the very problem you are trying to deal with robs you of the ability to deal with it.
Grief is rough, and it can break coping mechanisms (usually, each child that dies breaks a method of coping, lose two or three and you can be a mess), but physiologically based mental illness can rob you of all your coping mechanisms.
On the other hand, especially in the modern world and in the United States, there is real hope of a kind that the world never had before.
Someone noticed that I posted about the baby Dallas matter (there is more than one) and other things *after* they were in the local newspaper and the only details I had were the reflections on my own life.
Well, my wife worked those nights, but she doesn't talk. So I post about the things I know. Sorry I don't have details.
If you have some free energy, drop by The Celibate Blog or Pie Polar Bear and leave them a kind word and say a prayer for them.
In times of great disasters people always want to know what they can do. The answer is simple: you can find a person and help them. One person at a time you can help people.
Peace and grace attend you.