I think the biggest thing is to teach responsibility and teach them to value what they have and to value the sense of accomplishment that comes from working for something.
I spoil my kids sometimes, admittedly - :) but, I also let them work for things so that they understand that we don't just print money when we want something. When my boys have to work to earn the gizmo or the money to buy things, they tend to be more mindful of it. They also get a sense of satisfaction that comes from earning it - not just having it given to them.
I also encourage them to focus on and never judge those less fortunate, because perhaps those people are having a hard time or didn't have the support they needed.
When it comes to creativity I make them turn off the TV and games. They have limited access. It's amazing how fast a bored mind will find something to do and usually that involves creativity with my boys because they are both very artistic.