2. Mow Lawns

I'm no fan of mowing my lawn, and it's not exactly a large one either. But I do it because I'd rather not pay someone else to do such a simple task. However, there are plenty of people who will gladly pay someone else to mow. And as lawn mowers are collapsible, you can pop it in the trunk and drive around the neighborhoods, offering your services. I spoke to a guy at work who said he made $100 in a few hours by mowing lawns. He used the cash to buy concert tickets, and he said he got a nice tan and a workout!