I keep my personal info out of databases as much as possible (which is how they find you), so if they want to try and locate/ID me, good luck. If you can tell me my own real name and home address, I'll pay you $50. Some things to avoid:

Listed phone numbers
Change of address forms
Voter registration forms
Giving out your home address/social security number/home phone when not legally required
Public group registrations (NRA, political parties, etc)
Product "warranty" cards (one of the WORST scams perpetuated by corporations)
Dealing with companies who sell your info

This is just a starter list and is not exhaustive.