I know a few marketers that swear by safe lists, but I have found them to be a total waste of time. Speaking of time they suck up your time. If you don't have money to market any other way then, by all means, give them a try, if you are homebound and money is an issue you may have the time to make this work. What didn't work for me may work for you. Also after you master using safelists you can earn money writing an ebook answering this very same question you asked. Include all that you have experienced using safe list the dos and don'ts.