Kids need a role model. You can act like a saint toward your own child, but if they see you treating everyone else like garbage, they’re going to soak that up and use it themselves. You have to be constantly mindful of your words, your attitude, and your actions. If parents are constantly fighting at home, the kids are going to pick up that habit. If there's aggression in the family, the child will eventually become aggressive too.
If you aren't honest when they ask you something, they'll learn how to lie from you—even if you think you're protecting them by withholding the truth. They’ll know you're lying. I know this firsthand because people lied to me all the time; I knew every single time, I just didn't say anything. Basically, whatever mistakes you make, your child is going to repeat them because you're their blueprint.
In my opinion, one of the biggest mistakes is "misguided love." For example, giving in to every whim "out of love," or buying them cheap junk to play with just to be nice. Letting them stay up until midnight watching TV "because you love them"—honestly, what a kid actually needs is for you to engage with them and teach them important life skills, not just mindless screen time. I'd call it "parental laziness" rather than love.
Ultimately, you have to start with yourself. Once you do that, you can raise your children differently than how your own parents raised you. I think a lot of us feel that way—we don't want to repeat the same old patterns. I certainly don't.
So yeah, those are just a few things that matter to me. 🙂