Planning for retirement is important, it isn't the sort of thing that you can just let happen. A lot of people recommend that you should start planning for retirement as early as you can. In most cases this is silly advice, you won't be able to make any real plans until you are much closer to retirement age.
Most people would tell you that you should start planning for retirement as early as possible. This is not really what they mean however. When they say planning for retirement they mean saving for retirement, they are not really the same thing. It is definitely a good idea to start saving for your retirement as soon as you can but you don't actually need to start making retirement plans until you are older. After all it would be silly to start planning your retirement while you are still in high school. It is a good idea to put some of the money from your part time job towards retirement but you probably shouldn't be planning it.