Hi,
In my opinion, business card definately is a must if you are doing business.
Go for a two sided business cards and try to print in thin plastic type that cannot be torn apart. This will stand out amongst the normal business cards.
A good combination of color, logo and arrangement will be crucial to be noticed.
On the upper left corner of the card, is your logo (next to the logo, try to create an interesting caption.
(Example : Acme - "your one stop center for home tools"

Upper right next to the corner, is your name, position, your cell number. Bottom part, is your address.
Lastly, behind the card, you can put up range of services that you are marketing.
Make a rounded edged cards will be good.
Cheers !
Vince