How to use Listsource?

[Abou C.]

Hello

Want to start sending yellow letters to an area I been studying and understanding. I would like to use List source to weed out absentee owners in state or out. I would like to know how to use this service effectly and send letters this month. 

Using it to find 3-4 units absentee owners or currently owned to see if the owner willing to sell. 

P.S please advise on what marketing works best and how to go about marketing for leads.