Knowing, feeling and following what your gut says to do. I have personally had a couple of huge failures with day trading, when following my gut. Everyone makes mistakes though. Now I am more experienced with trading, but I moved on from it. I also always listened to the more experienced traders, like on YouTube or some news articles found on Google. Buy and hold are the only strategies in the crypto trading really, day trading is super risky and I only advise to get into it with a little bit of knowledge and lecture. At your beginning start with a couple of hundred bucks, maybe if you're wealthy enough with more, but at first I advise to start small.