One way to go green is to reduce all the waste and unwanted (or unneeded) items in your own house. Follow this simple rule: When you bring something into the house that you need, take something out that it is replacing. For example, if you buy a new sweater, throw an old sweater into a donation bag and give it to a nonprofit center like Goodwill or The Salvation Army. If you buy a new cell phone, don't stash the old one in the junk drawer; instead, bring it to your cell phone store and have it recycled. One goes in, another goes out: It really is that simple.