I follow some rules. Am not sure if they will work you for everyone but these are the basics.
1. Keep it simple. Once I tried to gather as much info before start trading. Many indicators, many news, vast analysis made me paralyzed to trade.
2. Avoid crypto trading on weekend and Friday too. Instead enjoy the holidays.
3. Never do Revenge trading, you will only trade whenever you have proper mindset.
4. Never love any asset, emotional trading will kill your investment.
Consider those tips as free gift, not financial advice. Always do your own research
Not sure about 1 - it might depend on everyone, more a mentality thing. I personally like to only trade once I have all the facts, which means I need to know everything about that coin before making a move in the market.
As for the other tips, I agree - it's all mentality issues that stem from the trader being greedy, and as stupid as this may sound, just don't worry money that much. Be happy with your earnings and don't spend too much time being obsessed with crypto news, and charts and you feel like you must invest more, and spend more time making more money. Be happy.