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.
Use manual focus. MF is the key step of macro photography. No matter to the camera or photographer, the shaking may damage the definition.
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.