Give up reliving your past trades.
Each trade is a new trade do not hold grudges against stocks and think they ‘owe’ you for past losses. Do not fall in love with a stock and hold it as it falls lower and lower.
Give up letting your trading define your self worth.
Do not let your trading define you. Diversify your life with friends, family, hobbies, and other interests. It is not healthy to become overly obsessed with the markets.
Give up on losing trades quickly when your stop is hit.
Your best trades will be the ones that are profitable from the start, if they immediately go against you be prepared to be stopped out. You can destroy your trading account when you start the “It will come back, I just have to wait” chant in the midst of a death spiral.
Give up on price targets let your winners run as far as they will go.
In the right market conditions trends can go on to unbelievable levels, the big wins during these trends can make your entire year profitable if losses are small on losing trades. If you set a predefined profit target you will miss the opportunity when the big move comes. Let a trailing stop take you out.