Capture things that other people may not have thought to capture.
You may have to get down on your knees and maybe even get a little dirty.
You will have fun pictures that you maybe even like better than the photos you normally take.
You're super nervous but you say yes anyway.
While you're walking around with them, snapping away,
Sometimes creative shots or "zooming" can be done after the fact by cropping it creatively.
Maybe you have a cute image but your subjects are making awkward faces, try cropping it!
When the little ones that you love are playing, perhaps getting some pictures from a different angle might be fun. Especially when you already have a million regular pictures of them playing with toys.
Getting down low, capturing a worm's-eye-view can be a fun way to switch things up.
Capturing shadows or shoes/feet are also a fun way to tell a different story with your images.
Document the important milestones in your subject's life by taking the normal pictures AND getting some funny angles that might be fun for them to look at later on.
Maybe take your subject somewhere fun and different than the normal stone/tree/mountain/house background and have fun with it!
Of course it is important to capture the "normal" pictures.
But it's also important to get creative and change things up.
Be a little crazy.