Well, it's as easy as making sure you are online, and while you are in your document, doing these 1-2-3...steps below for some of the easiest, first and most obvious free clipart online available.
You can have your feast of logos, mascots, identity and business cards, invitations, letterheads. In addition, there are no hassles of license terms. The electronic art available on the Internet is an extension of this concept. These images are digitized drawings on low resolution used for decorating Invitations and E-greetings.
You probably know you have standard stock clipart with your Microsoft package. You click on INSERT --> PICTURE and then type in what subject type of picture category you want....and you get a few samples that pop up. But there's really not very many to choose from. Kind of boring.