"I'm very fortunate. I have a bunch of hard-working, caring kids" he added.
"I'm really proud. My children talk about Angie every day, what their Mam used to do, what she used to "
Ian and Angie married in 1985 after falling in love at 14 when they met in the park in Grimethorpe, South Yorks.
The couple had three sons Ryan, 32, Damon, 29, and Reece, 27 before Angie developed cancer for the first time aged just 29.
After getting the all clear five years later, they had five more kids – Connor, 19, twins Jake and Jade, 15, Corey, 12, and Ella, 10.
But in 2008, non-smoker Angie, was diagnosed with incurable lung cancer - prompting her to write the list.
After Angie's death, Ian noted daughter Ella's first nativity play as a particularly difficult moment.
He added: "As I sat down a teacher said 'Mr Millthorpe, you are in for a real treat'. Then Ella sang a solo number. I could see the parents turning to look at me. I was almost in tears and I kept looking up wishing Angie could see her too."
According to Ian, the list has worked so well that the rules are being passed on to his grandkids – Ryan's son Issak, seven, Damon's two sons Warren, 11, and Cohen, 17 weeks, and Reece's son Jaxon, three, and daughter Willow, one.
"I miss Angie every day but I really did feel her absence during the birth of our grandchildren. She'd have loved hugging them, just as I do," Ian said.
But the hands-on dad has his own health battles. Having survived a brain haemorrhage in 2004, Ian has chronic lung disease and has trouble breathing after over 20 years as a miner.
He said: "The hardest thing I've had to deal with is my health. I just want to do right by Angie and my kids. I don't want to become a burden."
Today Ian and the family will walk along the Yorkshire coast - following rule number seven on Angie's list
He said: "We're going to do our annual walk across Thornwick Bay at Flamborough Head, where we'll pay a visit to Angie's bench, lay flowers and share memories.
"We used to lay in that spot as teenagers looking over the bay, so it's a perfect way to keep her involved. When we used to do the walk with Angie, she'd cook a medium rare steak back at home, with chips, onion rings, mushrooms and a sliced tomato.
"This year I'll order that from a pub, where I'll unwrap presents from the kids. My older sons get me Joop or Hugo Boss aftershave as a nod to Angie, as she'd always got me that from them."
Angie's 15-point plan:
1. Plait girls hair or it splits.
2. Must do homework before bed.
3. Must be in[side] one hour before dark.
4. Vet TV programs.
5. Don't let them bite nails.
6. Vet boyfriends/girlfriends.
7. Keep going to Thornwick with rest of the family.
8. Be strict with them.
9. Check their hair for nits.
10. Only one hour a day on computer.
11. Make sure Ella has her meningitis booster.
12. Don't have iron too hot for shirts.
13. Don't leave Ella in bath alone.
14. Don't give them too many sweets.
15. Sun block on hot days.