It's going to be the first Father's Day when my husband's father is not with us. Yesterday we visited his grave and brought him flowers. It was very sad. Last year he was very sick already, but still with us and you could congratulate him in person, shake his hand, talk to him, moreover, the doctors told us he could still live several more years...
I think we often take our parents for granted, and only realise how much they meant for us when we lose them. This should not be the case. If your father is still alive, value the time you spend with him, because you never know when he is taken away from you.
Honouring your father is more than just visiting him regularly, though. It means not breaking faith with your kindred in general. Here is a good article which goes into more detail on this topic: