Macro lens: This is necessary for macro photography (there are some replacements if you just want to try macro photography). I'd recommend Canon MPE 65mm F/2.9 1-5X
Ring flash: It can help you get the macro image without shadow.
Tripod and shutter line: Stability is the biggest problem of macro photography
The closer the subject, the lower the depth-of-field. Try to use big aperture to decrease the depth-of-field can make more attracting scenes.
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Use manual focus. MF is the key step of macro photography. No matter to the camera or photographer, the shaking may damage the definition.
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Ring flash allows you using a quicker shutter speed, lower ISO and smaller aperture. Meantime, adding reflective plate or light source is also a good choice.