> Don’t force yourself to do anything you hate. If you get too good at this, you won’t be able to figure out when to quit.
I'd moderate this a bit. Maybe, "If you are forcing yourself to do what you hate, step back and think: is the goal worth the slog to me?"
> Be suspicious of roles that compensate you with status or non-financial rewards.
This is the worst, to me. Purely financial motivation is one of the surest ways to be trapped in a role you hate. Make sure what you do offers you personal and social rewards that you value.
> Join Twitter — there’s no better way to reduce tunnel vision.
Twitter is the most awful social-pressure tool ever created. Please, I beg of you, do not join Twitter!