Getting a job is a start. You can also make money simply by saving money. Although you must factor in inflation over the years, so slow prepping as you save is also a good investment and can mitigate the threat of long-term price inflation.
Some good ways to save money: 1) Do not go to college its too expensive (the student loan racket is horrific) instead go to a cheap trade school and learn some skills you would need for certain jobs. 2) Cancel cable TV and either get a stream box or use DVDs to watch stuff (its much cheaper). 3) Cancel the bill to your phone line and "smartphone", get a cheap old-fashion flip phone or jitterbug for just a small fraction of the cost. 4) Get an old used mechanical vehicle, fix it up and learn how to maintain it. Much cheaper than buying a new vehicle and going into debt. 5) Learn how to cook, believe it or not this will save you money overtime. You can prepare dishes for much cheaper than you'd pay at restaurants.