Everyone has their own approach, their own habits, but what I realized for myself is that it is important to create a list of rules that you will never break under any circumstances.
Not a huge list, up to 10 rules, but once you start sticking to it your trading results noticeably improve. So everyone looks for their own approach but I definitely would never buy any strategy for money.
To me, they all bounces back to discipline and whenever a trader is disciplined enough they can or could abide to some specific strategies to follow and it doesn't require much just as you said, 5-10 is okay for a smart trader who must make profits. Sometimes the amount isn't the basics things or becoming too smart is not the utmost thing but how long they could remain in trading count mostly that is why some many traders who claims to be Smart traders today are no place to be found in the market because they are being swiped away by the market volatility. Although some of them are solely interested in shitcoin which they thought it's the fastest way to make profits from the market without knowing that the market isn't for the weak minded. Realistically, basing on specific strategies and key into them helps alot and that would make them remain on track.
I think that there is no necessity of having rules and sticking with them. Of course they are good but I have a different point, the huge mistake that people make during trading is that they think short-term, they do not think long-term, about the future. Even if you buy Bitcoin today at 110K USD and it goes down, that's okay, maybe it was your unlucky step but the next years are ahead, it will definitely rise the next time, that's almost like a guaranteed to happen because of so many factors like strategic reserve creation, halving, more adoption, more investment from companies like MicroStrategy and so on. Patience is the key, slow and steady wins the race.