I have a 2.7-year old (son) and a 9-month-old (daughter). My husband is an ESTJ. We are still figuring discipline out.
So far it is a mix of the socratic method, deductive reasoning, time-out, deprivation of beloved things, bribery, extortion, and positive reinforcement (in no particular order). And, yes, occasionally spanking (to the 2-year-old, only).
I had never planned to have children, and didn't intend to for several years, if at all. Then, once I came to terms with my first pregnancy, I had planned to only practice enlightened parenting (no yelling, no spanking, no short temper, no emotionally charged or high pressure situations, only positive redirection, totally unlike my own upbringing), but when my two-year-old wouldn't listen to reason (and nothing else worked), sometimes I have lost my temper. Originally, I didn't spank and only my husband did, until I persuaded him to give it up, and only resort to "stand-in-the-corner" techniques, and (for lack of a better term), intimidation. The intimidation usually works like a charm when my son won't listen to anything else, but I prefer it to be a last resort after I try reasoning with him. (I call intimidation when my husband comes in from another room, and stands over my son with a unhappy or even angry look on his face and "intimidates" our son into submission).
I have gotten much better over time at minimizing stressful situations with the kids, but I am often left alone with the two of them, and occasionally they are both crying (screaming) at the same time. That is when it is most difficult, but redirection of thought really helps.
My son is very bold, energetic, and easily distracted and excitable. I would type him an ENTJ (but he may be an S instead of an N, and being a child, he is very emotional and affectionate, so he may be an F instead of an T). I forget how young he is and often see him as a much older soul than he probably is. I respect him.
My daughter is still a baby, of course, but she is very temperamental. She throws fits and screams at the top of her lungs when she is very tired, and has to be held until she calms down. That said, both children sleep in their own beds, in their own rooms, and do excellently with their more independent milestones. They both seem very bright and happy, and we always get compliments on how polite (and energetic) and funny and sweet my son is, and how cute and happy my daughter is.
You will do what works for you and your children, but my advice is to make sure you take time out for yourself. When you don't, your frustration can bubble over to your children, and cloud your judgment for the best discipline technique for the situation.