how did he get your number ? are you in the phone book? I only answer known callers and anyone not known rolls to voice mail/answering machine. Any accidental pickups by me I just hang up on them. My home phone ? Skype.
My cell phone is pre-paid I refill it via cash when it gets low.
US Mail ? to a PO BOX versus my mailbox
FedEx/UPS? our front receptionist at my office allows personal packages to arrive to the office.
I recommend you read up on ID theft and lock your stuff down, too many scammers out there today.
Trivia: Think Snowden / NSA is bad ? Try the credit bureaus, almost any piece of information about you can be retrieved from them. FYI