Had a good giggle reading through some of these stories, not because I'm laughing at the author, but because I've been there.
The two most memorable for me were when I was still fresh to trading, I played with binary trading. Practised a little on the demo account (for about a week - mini-mistake 1), scaled up, put R10k in a broker's account, proceeded to lose R4k in one trade (about 10 mins) because I kept moving a stop.
Second one was less expensive. Fast forward a few years, got me a new broker and a proper plan and trading system. Opened a short on the USD/ZAR. Stop kicked in on my software, and closed the trade...or so I thought. Every day, I got a statement from the broker showing the trade. I thought it was the summary, until sometime, about 3 months later, I thought, "Hang on, those numbers don't look the same!" Opened a few of the previous emails, noticed the current price numbers had changed, opened MT4 and..."Hey, that trade is still open!" -600 or so points later. Luckily, it's micro-lots and it only cost me a few dollars...hahahaha...I honestly wasn't even angry about this one. I just had to laugh it off!
The learning has been a slow process. The best lesson I've learnt so far, I think it's been echoed in some way or another in the previous posts is, "There is no Holy Grail". If took many years to finally accept and internalise that, and you know what? It takes the pressure right off! I've been able to learn and play freely, make a little here, lose a little there, and take it all in my stride.
One thing I must say about trading is that it's taught me a lot about myself. How to be clear, focussed, assertive. To prioritise and filter things, to be able to say no, how to research and learn. Even if I ultimately never make money from the markets, I think that knowledge I've gained is priceless.