There are a few options one could consider. But Matt is right- there are members on this very forum who have gone through the 'tried and true' baby boomer method of: graduate high school, get a 4 year degree, have a simple life; only its not so true anymore.
I think the medical profession is an opportunity to explore. If you can get into a physician's assistant's program at a local community college, you will have the opportunity to make more money than an RN, work anywhere in the country, be in higher demand than RN's, and have a future.
Being a mechanic is another interesting opportunity. However, with the way the industry has gone, you're going to have to bank on working for a dealership; the days of independent shops are coming to a close. The cars that are being made today are so technically advanced, and auto manufacturers are keeping all their technology 'secrets' to themselves; and the market for brakes and oil changes is already flooded. But if you can build you way up as a tech, you may have a future. Going into diesel is an excellent option. Working on construction equipment, trains, transport refrigeration will be necessary and is in higher demand than being an auto tech.
I struggle with these thoughts as well, and I'm very well employed. I make a very decent salary (my wife gets to stay home, I own my home, my kids do not go without needs and get most of their wants), I don't see my career being an option for the next 30 years, not to mention I loath corporate America and its fixation on, money money money, numbers, numbers, numbers, more more more. It is by the grace of Our Lord that I have the job I do. A friend told me, wisely, that He gave it to me because I am not my own anymore, but have a family. But what is one to do in a position like mine? I am not able to go to school considering my schedule, community colleges are overflowing, a private school can cost upwards of 120k... I leave my life in His hands, but one must also be prudent, especially when there are mouths which depend on you.