Here are the three things that your children need to hear from you:
1. I love you
2. I'm proud of you...(make sure to state what speciifically you are proud of)
3. You are good at...(make sure to state what speciifically what they are good at)
Make sure that you constantly share these three things through your children's lives. By focusing on these it will significantly impact their lives, their confidence, and their self-esteem knowing that you love them, that you're proud of them, and what they're good at. After all, it's the right thing to do and models the way for others.