This is really nothing ground breaking, but I tried it out and it works great.The more time you invest the better your results will be.I only did this for 2 days 1 hour each day and so far I've got 180 subscribers for my niche with 2 hours work.. What you will be doing is using Google Alerts to build your list. First thing you need is a domain for whatever niche you are targeting.On your domain you want to put a squeeze page to capture name and email.I used a free month trial of icontact and set it up on my squeeze page.Theres tutorials on Youtube how to set that up.Also there free squeeze pages just do a google search. After your site is setup go to Google Alerts and put in your niche keyword and select "all results" and "as they happen".This will give you the maximum results.You can go to Google keyword planner and download a list of keywords for your niche to use. It's a good idea to make a Facebook account too because it makes it easier to signup so you can comment. Go to each site on Google alerts and leave a comment with your link with "http://" so it's clickable.Most of the places you will leave a comment you will need to signup but its worth it.Alot of the sites have Signup with Facebook or Twitter which is really fast. Put your keyword list in a notepad and spend as much time as you want putting each keyword into Google Alerts and commenting on every link.Be creative with your comment and don't make it spammy.Talk like a real person providing value with your comment.Your results will be better.You can use the same comment on each site.Just keep your comment in a notepad. You will start getting subscribers within the first 10 minutes. You can also use this method on Google News with fresh news stories published today.Works just as good.It also helps to have a good looking squeeze page too.There are some good ones you just have to search them. I only used one keyword in my niche to get 180 subscribers.Im still getting subscribers and I haven't messed with it in over a month.You can download 800 keywords on google keyword planner and use each keyword.So you can see how powerful this is. Like I said this is nothing ground breaking but it works great.You can even outsource the work if you want to go big time. Try it out and let me know how it works for you.