if someone is good at what they do, you remember who they are and then you know who's business card it is, a business card is a contact reference and nothing else, you personally give out your business cards so if you sell yourself they'll keep the business card.
if your in a rush and don't have time to chat, give em a flyer and a business card. to me, to much on a business card can sometimes look unprofessional. it should never look like a sales pitch.
but thats just my opinion on here and not necessarily the right one.
keep it simple, with a quality card.
i'd be embarrassed if i pulled out a four fold business card, all singing all dancing, flashing lights, discount voucher, nothing to pay for 12 months, 3 years interest free credit, and gave it to one of my clients, they'd say "nice card, but wheres the telephone number" i'd say "its on there somewhere love, you'll find it eventually, probably somewhere near the small print"
viking lager
for the man on a budget
tel...0123456789
mob...01234567899
email viking.lager.cheap.com
simple
derek