Have been doing a bit of reading into this, in the hopes of bettering my focus technique, getting sharper pics and more keepers.

I take a lot of pictures of kids and animals at the moment, and they're generally moving targets, so focus can be a bit hit and miss for me.

I am quite a novice, and have a lot to learn, although I think I understand the basic concept of back button focus. Just wanting some input as to whether attempting to use back button focus rather than the shutter button is going to help me. So, will AI mode and back button help me pin down those pesky kids a little better? Will also combine with fast shutter speed wherever possible. I have a couple of pretty fast lenses - one of which was pretty bloody expensive, and I'm not getting the best out of them consistently at this point .

Thanks!