I didn't put a title on my business cards, but since my business is called Ask Viki! Ltd. and my name is Viki, I figured it redundant to put that I'm the owner! But, on and in everything else, for example, my email signature says "Viki Garrison, Owner".

On the back of my biz card is a list of 9 things I can do for a client and the words "Notes:" Half of the back is blank under the 'Notes:" so they can write notes! I had the back completely filled with a list of my services, but at a seminar I attended called How to Start a Business, the lecturer liked my card except he said that people write on the backs, so I compromised and only filled half the back.

Good Luck!
Viki