Recently I decided to purge my business card rolodex. In the stage that I am in within my business I am more interested in the quality of contacts vs. the quantity.
When I was actively networking I would keep the cards in my rolodex after adding their information in Outlook. I was also very selective on whose card I would take. I always write notes on the back of their cards pertaining to our discussions as well. If they were an interesting individual

I would then send out a note card to them within a few days as a follow-up.
For those of you who are now actively attending social networking events and obtaining those handful of cards each time, how do you organize them when you return back to the office? Do you immediately add them to your contact manager and discard the business card, or do you keep them in a traditional card file? Also, how do you go about following up with the new contacts you have made, do you have a system in place that you'd like to share?