Keep one reliable formula close: something warm, something green, something bright, and something with enough substance to carry the plate.
Rice with beans, greens, olive oil, and lemon can become dinner. So can pasta with peas, broth, herbs, and a little parmesan. The point is not to make something impressive. It is to make something steady when the day has already used most of your attention.
Write down the combinations that rescue a weeknight. Those are the recipes worth keeping.