How do I stop busting out early?

I have been going on a terrible run at MTTs - and I am playing in one tonight.

I used to be a lock to make it through to the 2nd half - and had a pretty good run of final tables - but for the last 8 or 9 times, I have busted out fairly early. And the thing is that there is not one cause of my busting out that I can point to. Each time it has been something different.

So what advice can you give me to stop myself from getting into early confrontations when I do not have the best of it?

A mantra?

A device that will give me an electrical shock if I go all in on a probably losing hand?

Something?