They're older and wiser- They have a few years on you, which means they have seen more of the world and have gathered a wealth of experience- which is only to be admired.
It’s easy to take our parents for granted. We forget the sacrifices they’ve made for us, and the effort it takes to raise happy, healthy children. Respect is foundational to love, and one of the best ways to show your parents that you love them is to treat them with respect. Small habits that you can incorporate into your daily routine, and a loving and positive attitude will make them feel loved and respected, and proud to have you as their child.
Talk to them regularly. Your parents can be the best friends you’ll ever have. They have rich lives and their years of stories are invaluable!!
Visit them often. Even if you don't live near them. You’ll be grateful for the time you spent with them when they're gone, and you’ll regret the lost opportunity if you don’t visit them.
Include your parents in your family activities. Invite them to movies, family dinners and on family vacation.
Help them maintain active lives. If your parents are elderly and have a hard time driving or getting around, take them to see their friends, to go shopping, to restaurants and out for walks.
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Organize visits with their grandchildren. If you have children, let them visit your parents as often as possible. A loving relationship between grandparents and grandchildren is one of the joys of life (not to mention free babysitting!). 
Try to understand her and see things from her point of the view. You would probably act just like her if you were in her shoes. She only wants what is best for you.
Respect is honoring the fact that they gave you life and care for you. Love is a separate but related feeling, although it is quite possible to love a person without having respect for them, such as an alcoholic parent.
Be affectionate and give them hugs and kisses (they still love it!).
Apologize if you've argued with them; remember that they have feelings, too.
Thank them for helping to make you the wonderful person you've become.
Now that you have income, spoil them the way they spoiled you. Bring them small gifts like flowers, chocolates or a book you think they might enjoy. Give them big gifts on their birthdays and important holidays.
Everyday, take the opportunity to tell your parents you love them.
We hope and pray that all of us will respect our parents while they are alive and after their death. One can honour his parents after their death through the following methods:
Performing daily pray to god for them.Giving charity on their behalf.