Here are 5 macro photography tips that I use when I do my macro photography.
1) Use a tripod. This is not always required but it will allow for a better "shooting percentage". A tripod helps with sharpness, will allow you to get the depth of field you need for most macro photography, and makes it easier when you are low to the ground getting those hard to reach shots.
2) Use a flash. Using your pop up flash is often not a good idea, depending how close you are to your subject your pop up flash will cast a shadow on the subject. Instead try using an off camera speed light to light your subject or better yet a ring light.
3) Manual Focus. When working in close quarters your autofocus will have troubles focusing and you will have more success using manual focus. I use my live view zoom in on my LCD and manual focus on my subject to get the sharpness I am looking for.
4) When shooting outdoors you will most likely encounter some wind. When shooting flowers or insects on flowers, it will help to anchor the flower to a stick to help stabilize the subject.
5) F16 is the minimum aperture you want, in order to get your subject in focus and achieve depth. With that being said, experiment with different apertures to achieve different effects.
This weeks post picture was taken with a 100mm macro f8 @ 1/30 sec
Hope these tips help with your macro photography!