I'm 19 and have manic depression, as do many extraverted intuitives, and spent almost a year cycling continually between dehydrated-from-the-crying depression and rob-a-bank mania. You can imagine how little of value got done in that time; it's thrown off my college education (though I plan to go back in the fall) and disturbed my relationship with my parents. It's my reading that many ENTPs become dependent or overconfident with their Ne and allow it to drag them into some tight spots. The cure, I'm told, is bolstering the auxiliary function in ENTP, Thinking, to sculpt my Ne- which is on permanent hypomanic overdrive, even for an ENTP- into a superior perceptual system undistorted by intuitive skimming over the details and hoping it all works out.
Now, no one's saying my Ti is in some way deficient, but it's obviously no match for my manic Ne, and that is a serious problem. How can I sharpen my Ti, and how should I apply it to my Ne?