I went to a couple of photo classes from Kristen Duke - she offers some great photo ebooks, so be sure to check out her site for those. I've reviewed the Say No to Auto in the past and it's a great guide if you want to learn more about using your camera.
So anyways, things that I took note of:
- to invoke candid moments, use action words (jump, dance, whisper, cuddle, huddle, etc)
- capture the moments before and after the action - they are more real
- for smiles during posed moments, try talking about favorites songs (maybe sing them with the wrong words to get a laugh), video games, sports, having them say "A E I O U"
- pull kids aside and take their pictures without their parents hovering and making them nervous
I also took her class on full-sun photography which is something I really struggle with - I avoid the sun at all costs! I didn't take notes during that class, but it was interesting to give full sun a chance. (Normally I tweek photos a little in photoshop, but all of the ones on this post are straight out of the camera so you can get an idea of that)