There will be days when your wife will make mistakes or when she’ll be difficult to be around. No one (and that includes you too) is perfect. She both wants and deserves your willingness to understand and forgive her. Remember that no relationship, and especially marriage, can be sustained without forgiveness.
Women especially want you to understand that the hormonal fluctuations that impact her mood are very real. So don’t make fun of her or say she’s “crazy” when she’s got her period or is pregnant or going through menopause. Be empathic and understanding instead.