Depending on the season you can do a variety of jobs. In the summer offer to keep your neighbors yard mowed for money, in the fall find people who need their leaves raked, and in the winter offer snow removal. Especially when it comes to snow removal you will be surprised at how eager people can be to pay someone else to do the job so that they do not have to! If you invest in a snowblower before winter you'll be amazed at how much money you can make in one day after a heavy snow.