His message resonates with me for a couple of reasons. First of all, my parents also didn't bless us each Friday night;we got blessed once a year, on Erev Yom Kippur. When we first married and had children, I felt that it would be appropriate to follow my parents' custom. My wife disagreed, and strongly felt that we should bless our children weekly, as he father had done. Her encouragement (and I think a very powerful Paysach Krohn lecture on the topic) convinced me, and we've been blessing our children every Friday night since that time.
The danger of doing something regularly - even weekly - is falling into a routine. But how many loving, tender routines do we really have? How many times each week do we (fathers) physically embrace our children - even if it's just putting our hands on their heads. Fathers can be (I might be describing myself, perhaps) somewhat authoritarian, distant and even off-putting at times. That simple blessing - placing your hands on your children - might very well be the only loving physical contact of the week.
I would add two thoughts to Rabbi Cohen's wonderful message.
Finally, when I began giving brachot to the kids, so did Rena. I think the first time I gave her a quizzical look, as if to say, "Hey, this is a father thing?" Why, she wondered, is it only for fathers? Shouldn't mothers bless their children as well? Indeed they should. And our children's mother does. Every week.
If you already bless your children, try adding a word of praise for each child afterwards. And if you don't yet bless your children before kiddush on Friday night, start now. (If it's not your minhag, I give you a heter to start a new minhag. Really.) It will be one new custom that you'll always be happy to keep.