your worst mistake

I risked money I couldn't afford to lose.

 

that bulgarian prostitute

 

Thinking that oil could never go down -- buying into peak oil theory.

 

The biggest mistake is not being in touch with reality. Trading successfully takes the equivalent of a college education to learn and then it's still tough to make it.

 

trading 20-30 TSLA options...and TSLA going the wrong way...

 

reality check: you went the wrong way.

 

always traded too small until I met a guy who said:

"always carry so much size that even thinking about it makes you puke over your shoes"

Today I still carry that much except that I liquidate one contract to keep my shoes clean

 

That sounds like horrible advice. It's basically gambling as the likelihood of losing everything is relatively high with that strategy.

 

How does that advice motivate you to trade successfully?

 

Since you're bound to lose money at first sooner or later, the smaller the better.