Don't just invest in something without completely thinking it over.
Don't invest money that you cannot afford to lose
Don't overtrade.
Don't ever chase the market - always buy weakness and sell into strength
Don't go long in a downtrend and don't go short in an uptrend, no matter how much it hurts.
Don’t insist on being right! If you try a stock a couple of times and it’s not cooperating, move on to the next trading idea.
Don’t trade other people’s ideas.
Not every trade you make will be a winning trade, so you must make sure that you make more money from your winning trades than you lose with your losing trades.
Do not be emotional about a trade – you will lose some and win some. Know the reason why you entered a trade and stick to those reasons. The less emotional you are the more successful you will be. Stick to your game plan.
Don’t buy all the stock at one time, buy a small amount at first and see what happens. Spread out your buying time over days or weeks. If it goes down a little, buy some more. If it goes down a lot, you may want to get out limiting your losses.
Do not rely on fundamental analysis, brokers advise, share price information, newspaper articles or business channels for your investing or trading decisions, you are asking for a painful experience in the markets.
Don’t ever buy a stock simply because it's unpopular - or sell a stock because it's popular.
Don't Let Good News Fool You. This is pure manipulation that serves to pull people back into the markets.
Don't trade every day - wait for a trend. It is better to make two winning trades a week than churning your account every day and make your broker rich.
Do what you love and love what you’re doing.
Take care and all the best!