Been retired since I was 38 and about 45 now. My wife wants more out of me than the Marine Corps did.
On the financial side every deployment I would receive per diem of a certain amount. I would get the cash out of the ATM horse it and eat Raman noodles every deployment to safe countries for six to seven months at a time and invest when I returned.
I have five deployments to combat zones which was hazardous duty pay of 500 extra a month and I would do the same.
I invested heavily into apple in 05 or 06 and then Tesla early on, also. I have a company that does my stuff now but I used to pay attention as much as possible.
In 08 when the housing market crashed I took out tons of loans for land and houses that were being auctioned off and made a good return on 2015.
I live off of interest pretty much now on things and some rentals that I have left. I don't live a life of anything crazy. I mostly hike, ride horses, rock climb, and sky dive for fun , so I don't spend much on that.
Just be good with your money, invest when you can and the market is in correction or worse.
My wife still works though as she sees how horrible retirement is on me. She runs the post offices in our area and wants to retire so if anything happens we have another retirement.
That's about it.