I've been asked some questions about my blog posts and how I use spreadsheets in my tax lien investing. As of 3 years ago, I concentrate solely on Online Tax Lien Auctions. Here is a link to a video I made for a group of people about my strategy in a 2011 auction. It shows how I decided to go for high rates of return in Arizona tax liens. The top is 16% and I was able to get 16% for every tax lien I bought in that auction.