"I take really good care of myself," the 60-year-old actress said. "I don't smoke and I don't drink. I sleep a lot, I just think it's an inside job too. I think it's attitude, a lot of it's attitude. I try to have a good one."
Sagal has played the role of Gemma Teller Morrow on Sons since the FX series made its debut in 2008. Asked whether she was down going into the final season of the Award-winning show, she said she's "sort of not in that yet."
"I'm just not thinking about that. I suppose it will get sad," she continued. "This one I'm sure there will be sad moments, but it has been an amazing ride."
As for her plans after the show, Sagal said she doesn't have any yet.
"I'm about to go back out there and see, see what happens next, so. I have been so blessed and so grateful to have had this job and the previous ones I've had," she said. "I feel very fortunate to have been here to have found this and to have [Kurt] write it for me."
Sagal's husband Kurt Sutter is the writer and producer of Sons. The couple has been married since 2004.
"I think he's quite brilliant, so it's nice to have that other perspective of your mate, where you are able to just create something together and different than at home talking about kids and being in your married life," she said of Sutter. "I find that fascinating and very sexy."