Accurate shutter speed

For slowly walking object, the shutter speed should change to 1000 to avoid the subject blur.

Get client strategy.

If people are taking photo, stand on the side and take a photo for them, then you show it to them for visual compare. Said "I can take a set of pictures for you, then you selected whatever you like, It will be 10 dollars per picture, if you don't like it, you don't need to pay for anything. Wanna get it a try? only two minutes."

High speed flash sync

It can increase the shutter speed limit, use it when the object it is moving and you need the flash on.