You can download quality icons from various websites. You should check for the quality of the site. A quality site can provide quality icons .There are various quality icons in several categories like emotion icons, animal icons , professional icons ,cool icons and many more . You can use these icons in your instant messenger conversations .You can just add these icons with your messages .This will give an edge to your messaging. You can also try creating your own icons by using different soft wares available for novice. These soft wares can be easily handled by anyone with limited designing knowledge. But you should be very patient in handling the soft wares. This is because you can't learn designing overnight .You need to observe patience.