I don't know if any of you have heard of the youtube channel Gray Man Concepts, but its really good information on how to basically disappear into a crowd, how to set up your property to know if someones been there and all sorts of other surveillance survival type information. I have probably listened to the numbered videos 10 times each because they are so in depth and interesting.

Heres a link to the youtube channel.

https://www.youtube.com/channel/UClsb_FhYfT9H5dBnq0uY8rg

Watch the ones that are numbered first.