Silence. No radio blaring. No TV running on and on. The phone doesn't ring as much. The calendar clears. The car stays put.

I've heard it from parents of college (searchage students again and again. This year, I heard it for myself. My daughter's off to school and now it's just me and my wife.

I knew this day was coming but now I want to help those for whom it will come all too soon enough. I've learned some things.

I've learned that it's bad to say as you leave your child on campus, "OK, Schnugems, if there's anything you need just call."

First, because she really hates that nickname “Schnugems.” And second, because she really hates it when it's mentioned in the presence of other kids.

I've learned that it's OK to send an e-mail. But as my wife reminds me, it's not OK for me to send ten e-mails... in one day.

I've learned that phone calls are OK too. But it’s better to let her call once, than me 50 times.

I've learned that old videos of your kids are OK. But watching them around the clock with a tissue box nearby is not.

And I've learned something about time.

It’s time to let her grow and time for me -- for once – to sit back, shut up and simply watch.

Watch Neil Cavuto's Common Sense weekdays at 4 p.m. ET on Your World with Cavuto. 

Neil Cavuto serves as senior vice president, anchor and managing editor for both FOX News Channel (FNC) and FOX Business Network (FBN). He is anchor of FNC's Your World with Cavuto - the number one rated cable news program for the 4 p.m. timeslot - as well as the FNC Saturday show Cavuto on Business. He also hosts Cavuto on FBN weeknights at 8 p.m. In addition to anchoring daily programs and breaking news specials on FNC and FBN, Cavuto oversees business news content for both networks and FNC's weekend business shows, including Bulls & Bears, Forbes on Fox, and Cashin' In. Click here for more on Neil Cavuto.