Research and development. Experimentation. Trial and Error. Brute Force. Etc. And a little luck (like the discovery of penicillin and post-it notes adhesive).
Mister Redneck, I seez the new cars you a selling are just like that they goes one way and come rite backs to yous? You Ma must be proud now when the two of yous go to the casino buffet on Sundays as she gets to sit up front now no matter whats. hee hee hee I sees you have also selling a 2nd car at your lot, pretty blue WITH A BACK SEAT for us types that want our wives to bees back there, you knows we wants our hunting dog up front. yous got sneaky way of keeping the odometer at one forever.....LOL Handle
I'd say any standard info you can find on trader psychology/biases is fine. The real benefit (at least in my experience) is in actively integrating what you read into your trading in real time and also when reviewing your trading. To be able to sit back from the market action, divorce yourself from what your hind brain is screaming at you to do and say "I've seen this before, X usually happens so I should wait and do Y even though I really feel like doing Z."
Before i started trading i searched online useful information on sites like traderxp, that can help me improve my game. I am a beginner, the last thing i want for myself is losing alot of money before i even started. some one told me the other day that it is very easy to act impulsively without any thought about the long run in this game. The best advice i can give is: "THINK BEFORE YOU DO" Trace
To improve your trading, all you need to know is 123 + FTT (10 price cases, 4 volume cases etc) to identify a trend (within some context), and use of stochs + MACD(or MA) to improve entry - e.g. when prices move from left side of a channel to right side of the channel
I like the works by Daniel Kahneman. For me, he is the King of thinking. I was delighted with the book On Making Smart Decisions. I like to look through this book several times.
Brainstorm, when I sometimes run out of ideas, just throw out everything that pops in your head, whether smart or dumb. Like this, yo yo-means yo wait for breakout then limit orders goes so many ticks below that level, sped of market-means big bars and what happens near exhaustion tops/bottoms after how many points in one direction, look for absurd patterns you dislike and then break them down so you can spot where the newbies are going to hang, I love looking at a chart and knowing where the newbies are going to get screwed, ok ok, they don't like being called newbies, how about bait and I am a shark, LOL. look for HINTS of when you should just take the profit than going for the target like three equal highs/lows in a row, things like that. Use more small price patterns, goes back to when I suggest traders develop a name for each bar, which takes like a year plus to complete, more names you can attach to each bar, better you can have an idea before everyone else, but they have to be researched and backtested.