If you want long-term stability in on-chain investment, you must turn "emotions" into "variables", not into "drivers". The characteristics of emotions are high volatility, quick feedback, and easy overreaction; the low friction of the blockchain makes it easier for you to directly translate emotions into actions. The truly mature approach is: let emotions only affect the "observation weight", not directly influence the "execution button".
You can establish a very simple mechanism: any impulse to take immediate action, first write down "why it must be done now"; if you can't write it out, don't do it, and if you can, first try a small amount. This mechanism will switch you from impulse mode back to rational mode. Emotions are not enemies, but they must be isolated from execution; otherwise, you will turn low friction into high loss.