There are few tricks when come to investment and there aren't much magical about it so far from my experience. A lot is common sense and this comes with personal experience or read up of others. Here's my result so far. The drawdown has been low. Gains have been accumulating. Portfolio size has grown many times. Here's pointers. I think Point 8 is most important.

1. Be Risk Adverse: Position Sizing of each stocks even if average down. One way is to buy another stock of similar traits and average down by industry or different segments. There are usually bad reasons for a high yield stock else is a gem. Again sizing is important.
2. Cut Loss: Never wait for breakeven. Say one invested in stock 50k and loss 25k. A rebound happens and now loss is reduced to 15k but still deep loss. Cut loss if fundamental has change for the worst.

...