My mother turned 90 today. I'm happy to report she's doing very well and living on her own in a seniors' apartment complex.
If I would credit anything to her longevity it's housework. She has always been phobic about keeping the home tidy and spotless. I remember visiting her about ten years ago and staying in the guest room. I got up one morning to go to the can and when I got out a few minutes later the bed was made.