Train until common mistakes become familiar enough to avoid early.

Common mistakes have signatures, and they show up early if you know what to look for. Training that includes making them, rather than only avoiding them, teaches you the feel of the wrong path in its opening moments. Recognition beats correction, because it costs less.

Ask someone experienced what the usual errors are in whatever you are learning, and then make those errors on purpose in a safe setting. Pay attention to what they felt like just before they became visible. Next time you will catch it while it is still small.