I started to see my real estate investing change when I physically got around other like-minded investors as much as possible. 

These are very expensive, but you have little choice.If this is a construction project, such as a flip, ensure the property fence and other physical protection are still in place.

BP has a lot of useful resources to help you, I have found the most useful thing for me to do was to actually attend a physical meetup or two as it lets you brush shoulders with others in the same shoes (or have been in the same shoes in the past). 

Has to be done physically at the courthouse.I have just been mailing to all probate filings without checking to see if their is property in the estate.Looking forward to hear what you find out on postalimpact.com

Our company conducts the entire purchase and closing process via email, as well as overnight any necessary physical documents needing signature.

You also don't need to send physical checks, as the deposit stays in the resident's name.

I’m an out of state landlord so can not physically go to the USPS office.Thank you for your guidance on this matter…P.S. the USPS owns my mailbox 

If you have an agent in the market or someone that you trust you should have them post physical notice that you are trying to reach them (and pay that person for their time).

No formula can be accurate across the board because even “cookie cutter” properties next store to each other differ as to view, location to the street, topography of the land, lot size, physical condition of the property, past remodeling, quality of the mechanical systems, sunlight, utility bills, past use, etc.  

FYI - most states require a lease to clearly state the owner, any agent of the owner and give a physical address for rent payments.