I really lost it today

Man I had one shitty day today trading.
I opened a mini account and was noing ok, then I had a decent gain early in the evening, then I guess I got cocky.
I started trading by the seat of my pants.
I doubled the position size I was using, started adding to a losing position, next thing you know I went from being up 30$ for the day to losing 170$
check out this post, its not me but I can relate.
http://209.85.215.104/search?q=cache:qOPIK_sMYZ0J:highprobability.blogspot.com/2008/05/trading-against-plan.html+%22trading+against+the+plan%22&hl=en&ct=clnk&cd=1&gl=us&client=firefox-a
I am not going to give up, I am going to stop trading "real" and go back to a demo account for a little bit.
It really is all about emotions.
I understand position sizing, I probably could get better at technical indicators and I definitely want to understand how to use "metaTrader"
Truth is, I am not that upset right now, I know what I did wrong and I