What indicators do you look at to determine whether the company is in good or bad health or trending in a direction?
Do you have anecdotes (or even more significant data!) about signs or events or shifts in culture that ended up foretelling a change to the company?
[Update(s)]
I mainly meant "startup" (i.e. not Fortune 500) when I said company. But I don't want to prevent discussions about larger entities, so perhaps we can preface comments with which type of company you're talking about if necessary. :)