Entering primarily because price is moving instead of because predefined conditions were met.

Changing your normal process after a loss in an attempt to recover quickly.

Taking a position whose potential loss exceeds your predefined risk.

Entering after a significant move without reassessing entry quality and risk.

Taking unnecessary trades simply to remain active.

Moving a predefined stop farther away solely because price moved against the trade.

Entering without deciding how gains, losses or invalidation will be handled.

Failing to account for liquidity, slippage and ability to exit.