In person, I'm a nice guy so they will probably like me.

I pick up the phone and schedule a time to stop by.

When I was an agent I would have my letter in hand and go to the house to see if I could catch the seller at home. If not I would leave it in their door.

In person followed by phone call followed by several direct mail.

I used a combination of phone calls and personal visits when I was a listing agent.

I have not done so recently. I usually attend thei open house.

Good morning Debbie. You have mentioned many way, I would use them all, but always used to prefer in person.

Face to face. They cannot look you in the eye to see your sincerity by email or a flier.

I don't unless I have a buyer for their property.  Then I call them.

I call and try to set up appointment.  If they refuse there I try to go in person.  Win them over with my devastating charm and abundance of wisdom.  JK  I do call first so when I stop by it shows a bit more than maybe the next.  Mark

I contact fsbo's by email and text.

Mail only, since my understanding of postal regulations is that you cannot put anything in a mail box.

As far as dropping by, I would not want someone that I didn't invite at my door step, so why would I do it to someone else.