How thin is too thin?

[threadwalker]

when you spread yourself thin across multiple commitments, how do you decide you've spread yourself too thin?

Is it a physical failure?
Mental paralysis?
Sudden unexpected shopping trips?
The insane desire to take on more, proving that you weren't overcommitted before but you might be nudging close to it now?
Friends warning you that you are frazzled or perhaps insane?
Or do you even notice before you collapse in a confused haze of exhaustion?

And what do you do to recover?
Do you cut out activities?
Freak and do a 180, becoming ultra-uncommitted?
Do you continue to try to keep all the balls in the air until you go to system failure?

Just curious.