I typically get up at 4:30am, have some coffee and waffles. Then, 50+ mins on the elliptical, however long until it says I hit 300 calories. I know it's not accurate but it's still around 55 mins and it's far from an easy workout. I try to do that 4-5 times a week. Also, have a bowflex I bought 25 years ago to stop paying for going to a gym and I'll hit that 3 times a week if I'm lucky. I think as we get older, heart-related exercise is more important than strength training... doesn't mean you don't do any strength training.. just means your heart should be the most important. Can you drop and do 50 push ups? If not, start at 10 a day... for a week or month.. then 15... 20, etc...
As for diet... well, I don't care for that word, as it implies 'temporary'... you should make changes that are smart and moderate and stick with them. Learn to associate bad things to that slice of pie vs how good it tastes... consider how much you have to work out to offset it, how much damage it's doing because it has no redeemable value... etc.
Food... should be your number 1 concern.
Cut out fried stuff... stop adding salt to things before you even taste them... heck, don't even use salt at all... I think I have a salt shaker somewhere but the salt is probably concrete-like by now.
Learn to count calories... loosing weight isn't magic... there are some health scenarios where that doesn't work but it's more common that it will work for you. Learn to read serving sizes...
As we get older.... I think we feel like we deserve to do what we want and feel like we've paid our dues so why have to be so restricted... but, it's just the opposite, we have to be more diligent than we have our whole lives.
I'm not perfect at all... I'll get ice cream or something bad from time to time but it's rare, maybe once a month.. maybe.. some do that every week or day... that adds up, slowly, but it adds up.
That's how I view things as I get into my mid 50's and hope to keep it going into my 60's, 70's and beyond. Hopefully, this helps some, this isn't pointed at Keith specifically, it's just my views on thing as I myself get older. And, yeah.... I probably drink enough in a year that many here spill on the floor... lol