They really do pull away and start disappearing somewhere around 16-17y/o and you HAVE to adjust to keep things close!!! So, great question and I can't wait to read your responses!!
Your ono-on-one breakfasts sound cool!
We also do a once a month family breakfast out and every Sunday Night we have 'Family Dinner' which rotates at either our house, my sister's house or my Mother's house---->As they age I have allowed them to invite friends to these family dinners if I *had* to, I would rather they be there w/a friend then not be there at all, ya know?
I also have tried to find at least one TV series to share with each of my boys...that way we can have a 'date night' kinda thing and hang out and watch our show together. This may sound lame but it works for us!
*My 18y/o and I just found out that there is in fact going to be a Season 8 of Dexter and we couldn't be more excited!!!
We also try to include them (and their friends an/or GF's) in the younger siblings sports...like it's almost baseball season and I can't wait to go to the games with all the boys!
Other than that, we try to communicate as often as possible and we try to plan little trips here and there, like going to The Grans house (on husband's side, which is 3 hours away) for the weekend and little weekend trips to the lake in the summer.
Mom/Auntie to 6 boys and (the youngest) 1 girl
21, 18, 17, 13, 9, 7 & (almost) 5