Firstly, you should have jotted some notes on the cards you received so you can follow up intelligently. It doesn't make a good impression if you get their spouse's name wrong in your follow-up. So, secretly, write notes on the backs of their cards so you can accurately remember details.
Prior to the event, plan your follow-up. Diarize your follow-up schedule so you'll have no excuse to procrastinate in taking action. Your follow-up period should be no more than a week for your first contact. Start off with a simple email. Thank them for their time and try to find something interesting to share with them. It could be a white paper, or an article which is relevant to them.
Depending
