http://REItips.com - Andy Proper's latest "Virtual Bird Dog Blueprint" is second to none. It lays out a complete, start-to-finish business system for AUTOMATED, OUTSOURCED real estate lead generation.
I have a bit of a unique perspective in this, as Andy asked me to help him with a number of aspects in putting the course together. Quality is extremely important to me, and I'll never recommend something to someone that I wouldn't invest in myself.