Make sure to always give positive reinforcement to your children. If they get good grades or score the winning point, take them to their favorite restaurant, give them an allowance bonus, tell them how proud you are of them, etc.
Make a concerted effort to follow-up. If you say you are going to do something for someone, do it. No empty promises.
Make sure you and your spouse both spend quality time ( when you focus only on the child, not on work, phone, internet or TV) with your children individually (and each child seperately), everyone needs one-on-one time.
Surprise your significant other with a small token of appreciation ( a rose, a note, a random act of kindness) often just to let them know how much you love them.
Let the important people in your life know it, remind them with a nice note every now and again about how much you appreciate them and why.