For those who may want to invest but don't want to be involved on a regular basis, there are the Bright Horizon target funds. You simply find the fund that is closest to your projected retirement year; however, keep in mind that these funds generally start aggressive and transition to more conservative investments as you near the target date. If you want to remain aggressive simply choose a target fund that is 10 years (or more) beyond your projected retirement year. These funds are basically "set it and forget it".