I highly recommend that you keep in contact with every actor that you work with. If you want really good self promotion, then you have to make sure that you don't lose contact with anyone. Yu never know when one of them could hit it big and be your ticket to the top.
The easiest way to stay in contact with people is to simply form an excel spreadsheet with the names and contact information of everyone you work with. Make sure you write down how you met them and something to help you remember who they were.
Also be sure to write down when the last time you contacted them was, this way you will be sure to send them a message every once in a while and you don't lose track of that.
Keeping in contact with everyone is so important if you want to be in control of your destiny... In regards to becoming successful and known. If you don't keep contact, then you are completely leaving it up to chance whether someone offers you a huge break.
Hey I'm Martin, and my goal is to help you reach yours. I love writing content about career advancement, marketing strategies, productivity, and much more.