I used Avery products for my business cards for my consulting business. Instead of having a box of hundreds of cards designed as a "one design fits all", I created cards to focus on the types of customers I was seeking at the moment. Now, long retired, I use Avery cards for my personal use.
These business cards print so easy and clean. Then after printing, you get an easy tear apart. The edges are so clean that you can give the business card away and look very professional.
Avery's business cards are so easy to use! I simply load the template on my computer and then put my information on them and print! They really allow my business to have nice, professional business cards without blowing my budget!
As a tour guide, I print a currency conversion chart on the front and back of the business cards (USD to local & local to USD). I put my logo on it and give it to clients when in country. It's a great tool for them to help negotiate in local currencies and gives me another way to promote my company! And being that I can print when I want, I can update the current exchange rate for each trip!