Tip #7 Make your own laundry detergent.
I have yet to do this, but have been seriously considering it. Maybe when we run out of laundry detergent. (But when you can get 2 bottles of Purex for $0.64 from Walgreens when they are BOGO and you have a BOGO coupon, what's the rush?) Trent over at The Simple Dollar has a great step-by-step blog post about how to do this.