Having a trading philosophy (and sticking with it) is the hardest part of trading. It takes patience and determiniation to stick with a strategy.
Buy and Hold
This is basically Warren Buffett’s strategy.
Indentify stocks and ETFs you want and trust. Make sure they are healthy
Buy those issues when their prices are reasonable or lower compared to their value
Hold those shares, until you need them
Never use market orders
Aways use limit orders to buy
For sells, either limit or trailing stops
Be dispassionate about trades: Don’t get emotionally attached
Always stick to the strategy: reduces stress