clipped from: www.kodak.com   
1.  Look your subject in the eye

Too high
Better

2.  Use a plain background

Distracting background
Better

3.  Use flash outdoors

If the person is within five feet, use the fill-flash mode; beyond five feet, the full-power mode may be required.

Subject is dark
After

4.  Move in close

Good
Better

5.  Move it from the middle

Bring your picture to life by simply moving your subject away from the middle of your picture.

Boring
Better

6.  Lock the focus

Most auto-focus cameras focus on whatever is in the center of the picture.

If you don't want a blurred picture, you'll need to first lock the focus with the subject in the middle and then recompose the picture so the subject is away from the middle.

Subject not in focus
Better

7.  Know your flash's range

The number one flash mistake is taking pictures beyond the flash's range.

Without flash
With flash

8.  Watch the light

Good
Also good

9.  Take some vertical pictures

Good
Better

10.  Be a picture director

Boring
Better