For me, I think it depends if you're going for a glam tree or one that is more family-style ie a very homey tribute to Xmas with assorted decorations that may not match perfectly but can be made with the help of your children.

I've always leaned towards the glam one but now that I'm a Mummy, I can't wait until DS is old enough to help me wreak havoc making decorations.

Which look are you going for? Based on that I can throw some suggestions your way - not saying they'll be good suggestions however.