Originally when I started visiting special networking events, I did not follow up with social media. I just recently got involved in the whole thing.

ut: However, any new contacts that I meet, I am now starting to get them first into my Linkedin and maybe my Facebook.
When you go to networking events; write on the back of the business card where you met them and a little bit of information about them. This way if the card gets mixed up with your other cards you will not wonder where you met that person. When you invite them to your Linkedin you can bring up that information, which may open the door a little faster.