Avoid purchases that are likely to depreciate rapidly. Spending $50,000 on a car is sometimes considered a waste because it's likely that it won't be worth half that much in five years, regardless of how much work you put into it. As soon as you drive a new car off the lot, it depreciates about 20%-25% in value and continues to do so each year you own it.  That makes buying a car a very important financial decision.
If you love kids, sign up for Care.com or SitterCity to spend a few hours a week babysitting. These websites verify both babysitters and those seeking sitters with background checks, so you can ensure you're conversing with a reliable source. Babysitting rates vary based on years of experience, number of children, and hours per week. According to ZipRecruiter, the average hourly rate for a babysitter is $28. Use Care.com's calculator to plug in your experience and find out how much your should be making an hour as a babysitter.
The folly of youth is believing that there's always enough time for everything. Youngsters often believe that retirement, or wealth building, is something that comes later in life, and are more preoccupied with the concerns of the now. Unfortunately, this often leads to a cycle of "Oh, I should do that next month," month after month, until before you know it, you're 10 years older and you've missed out on a decade's worth of compounding interest. The first step is to stop procrastinating; saving and investing is scary, but the longer you wait to do it, the fewer advantages you have.