Lighting also presents problems with macro shots. With the lens (and photographer) closer to the subject, you'll introduce shadows. Ambient light works best. Use a white card to bounce light onto the subject.
You may be tempted to use a flash. That can bleach out your subject. So, if you use a flash, use a diffuser to soften the light. You can also buy macro flash units. These soften the glare caused by standard flash units.
Macro photography presents its own set of challenges. However, when you want to get up close and personal with small objects, there's no better way.
Kim Komando hosts the nation's largest talk radio show about computers and the Internet.