As I was researching a niche, i came across the mention of google alerts. You are allowed to place any words in the alerts and be notified when a new posting (blog, video, etc.) is found by Google. This is totally automatic.  Imagine the power of this free tool. You have started selling in a niche and want to keep current to new developments. All you have to go is set an alert and a time frame (whenever a new post occurs, daily, or weekly), and you can continually be up to date on the devel