Alan Alda is taking on his illness with a smile.In 2015, the "M*A*S*H" star was diagnosed with Parkinsons disease. He also has face blindness, or prosopagnosia, which makes it difficult for him to recognize people.The 89-year-old told People magazine on Wednesday that managing his Parkinsons has "gone from a part-time job to almost a full-time job keeping track of all these little solutions."M.A.S.H STAR LORETTA SWIT SAYS SHE CONTINUES TO SUPPORT VETERANS IN OUR COUNTRY: THEYRE OUR HEROES"But it keeps me always looking for the funny side," the actor shared."Almost every day Im finding a new way to do something," the father of three told the outlet. "Its a little like a game. Ive found whatever the little problem is, if I keep at it, I can eventually solve it, and then I feel like a million bucks. Its a way to have a good time under poor circumstances."Acting continues to keep Alda busy. Most recently, he made a cameo appearance in Tina Feys Netflix series adaptation of his 1981 film, "The Four Seasons." It has already been renewed for a second season.Aldas character in Feys series is known for offering advice from his wife. Its no different from real life, he said. Alda has been married to his spouse, Arlene, for 68 years."She always says, The secret to marriage is a short memory," Alda told the outlet. "We both try to practice being there when were there: listening, answering, taking an interest. You can get used to somebody, no matter who it is. Ive always thought if the Pope and Mother Teresa were a couple, after a few years, theyd have to work it out."According to the outlet, Alda met Arlene, 92, during their college days in 1956 at a mutual friends party in New York City. When a rum cake fell onto the floor, they were the only two guests who didnt hesitate to eat it.CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTERIt was love at first sight."[I knew she was the one] when we ate the cake off the floor," said Alda. "There's something about flirting over food, and that she laughed at my jokes meant a lot. We still laugh at each other's jokes a lot, and she's getting funnier every day."And as Alda navigates his Parkinsons, Arlene continues to be by his side.WATCH: MIKE FARRELL TALKS ABOUT HIS FRIENDSHIP WITH ALAN ALDA"I dont have dexterity with my fingers the way I used to, so sometimes she has to tear a package open for me," Alda explained. "Shes so good-natured about it. Im always saying, Thank you. I dont get proud. I'm glad that I can do something. Proud seems like a waste of time."Back in 2019, Alda recalled to Fox News Digital what it was like filming the final episode of "M*A*S*H," titled "Goodbye, Farewell and Amen," which he also directed. TheWashington Post reported more than 106 million viewers watched the series finale. The outlet also shared that the episode was so highly anticipated that 30-second advertising slots sold for $50,000, more than some slots for the 1983 Super Bowl.In addition to this, theUnited Press International reported that an estimated one million viewers in New York City alone used the toilet after the show ended, pouring 6.7 million gallons of water through the citys sewers.Alda said the pressure was on to deliver a final goodbye that fans wouldn't forget."I wanted to end it in a way that showed that everybody was going home with some kind of wound from the war," said Alda. "That the war didnt leave anybody the way they were when they started. Sometimes it was physical wounds, and sometimes it was emotional. We wanted to be authentic about that and genuine.""I also wanted to give everybody a goodbye, including the extras," Alda continued. "You know, the audience got to know the extras on the show. So I gave them all speeches about what they were all going to do when they got home. Which didnt always go well with them because they werent used to acting, they were all used to being in the background."LIKE WHAT YOURE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWSThe star admitted he was faced with even bigger obstacles."The other challenge in directing the final episode was the outdoor location that we used in the mountains of Malibu," said Alda."It caught fire on a Friday night or Saturday morning, and the entire set burned to the ground. I still had a lot of scenes to shoot there. So I spent the weekend rewriting the script and wrote a fire into it. And the rest of the show took place in another location. But thats one of the fun things that happen when youre acting. You have everything prepared. Everything is all set up to go, and then at the last minute, you have to improvise, which is exciting."He also told Fox News Digital that his wifes advice on keeping a short memory to ensure a long marriage "works.""Two people cant live together unless they occasionally have a difference of opinion or a different way of doing things," he said. "And as youre working that out, no matter how strongly you feel, I think its good to remember that you love this person. Its easy to forget when you get upset about something. And it shortens up the conversation a lot."