At 18, three weeks after graduating from high school, I left home with $20 in my pocket and the clothes I was wearing on my back to join the Navy. At the time, it was the one and only chance a poor kid had of getting away from a sleepy little Midwestern town. Looking back, I have occasionally thought about how I might have done things differently, and I have always concluded that I would do the same thing again. The Navy was good for me; it made me grow up and gave me the idea that, with hard work and smart decisions, I might just make something of myself. I particularly appreciated the idea that I didn't need to guess what it would take to be successful in that environment. They said "do this, and the better you do it, the more successful you will be." I took to that like a duck to water. I feel sorry sometimes for kids today, who must grapple with what the world demands, and figure out for themselves how to be successful.
The Navy gave me a college education, a challenging job, and a skill that I then put to good use when I left to return to civilian life. The discipline that I learned in the service later helped me complete law school and then helped me prepare for early retirement. I will be forever grateful for the opportunity that they gave a young, dumb kid long ago.
So, for my money, if you're 18, you can't go far wrong serving our country.