I dont really have a system with this. I try to leave informational material after I leave, usually the comparison between advantage and supplement, and some costs information. What do you leave with your clients after enrollment, if anything?
I haven't done face to face in 8+ years. But, if I did do it over again, I think fridge magnets of your business card is a good idea. Always there, can be found easily, constant reminder of who you are, and a good referral source too. Downside.....they may actually call you too often