$Alphabet - C(GOOG.US)$Taiwan Semiconductor(TSM.US)$NVIDIA(NVDA.US)$Berkshire Hathaway B(BRK.B.US)$Tesla(TSLA.US)$Apple(AAPL.US)

1. Don't short sell.

2. Don't heavily invest in small-cap stocks with a market cap below $10 billion.

3. Don't heavily invest in options, and don't buy short-term call options.

4. If you've been losing money consistently from day trading, try to avoid it in the future. Stick to value investing.

5. Don't buy options that expire within three months.

Don't buy options that are too far out-of-the-money.

Don't use money you can't afford to lose to buy options.

Don't act unless there's a good opportunity (like a major drop).

Don't let your options position become a heavy one.

After making a profit, take profits in stages or roll over the position; don't be greedy.