The number one goal for every trader should be to never blow up their account. If you've done it before so be it. You've earned your stripes and can now move on and become elite. If you've never done it, congrats, now keep your focus and never get too far ahead of yourself. Blowing up an account is the worst feeling in the world. Avoid it like the your life depends on it. If you need to take some time off because your trading is sloppy, do it, refresh yourself and refine your process.
Trading is all about risk vs reward. It's your duty to properly weigh each trade in respect to your total book. Never lay out more than .5-5% of your book on any single trade that you carry overnight. If you're day trading, you must have a plan, a stop, a max pain to prevent yourself from losing more inventory than you can afford to lose.
Losing trades happen, it's your duty to admit defeat and recognize when you're wrong as quickly as possible. It's also your duty to do your best getting the most out of each trade. Taking targets and raising your stops is one way to help with your patience.
Profit taking is the goal, never fall in love with any one position. It's all ****. If you're up in a position, take a target or two and move your stop to break even. As the position works for you, take additional targets and keep raising your stop. If you have a long term outlook and your stock looks heavy in the interim, buy protection--hedge yourself and protect yourself from moves to the downside.
Always have a plan and a set risk when trading. If you have a higher low you can base your risk off of, buy the dip. If you have a lower high you can base your risk off of, short the pop. You can do anything as long as you have a plan and properly manage your risk.
If you're trading options be aware of your premium levels. Front month premium kills. If you have thirty days to expiration or less and your position is out of the money, theta will wither away your premium levels if you don't get that fast and aggressive move in the right direction.
Be aware of how implied volatility works. Don't buy out of the money options in a low vol stock. Consider selling a credit spread to finance your option, or creating a debit spread to put theta and IV on your side.
Weekly options are heavenly if you're a day trader or you trade catalyst events. But you need to understand how they work. $500 of risk in a weekly option is equivalent to $5,000 of risk in an option expiring in six months. Never fight and average down on a weekly option that's out of the money, it will happily go to zero at expiration.
Everything is a risk vs reward set up. Risk $100 to make at least $300. Never risk $300 to make $100.
Find your niche. Learn what works for you. I use value areas when trading and occasionally the ichimoku cloud. Some people like 8/21 day ema's. Others like 10, 20, 50, 200 day sma's. Some just trade patterns. Learn what works best for you and refine it.
If you're a beginner, never ever sell an option naked or short a stock without a hard stop in place. The last thing you want is blowout risk.
If you trade small caps and low float stocks, learn level 2 and use limit orders to avoid getting screwed by the spread. Also learn about float rotation and stay away from shorting stocks that are having their floats churned. Wait for the backside of the move. Being early on the front side and fighting it short will blow up your account.
Two things I've learned from IU: I'm either right or right out, and I nail and bail a trade. I don't get greedy, I don't get emotional, I trade what's in front of me. Hope will bankrupt you, logic, discipline and patience will make you rich.
Wait for the best risk reward set ups. It could be boring, but so be it. Sitting in your hands will keep you out of being chopped up in boredom trades. Be like a hunter waiting for his prey. Never be antsy and trade just to trade. You trade because you have a good risk reward set up that you can take advantage of. Sometimes you'll be wrong but if you keep your losses small and get the meat of the move when you're right, in the long run you'll be profitable.